Stuck as a shadow, Lena tries to protect Webby from her suspicious new friend Violet during a supernatural sleepover.
At morning time, Webby had caught a bus to make her way towards the Duckburg Public Library. As she enters the library, Lena appears out of Webby's shadow in her shadow form, unseen by anyone else including Webby. Webby then makes her way towards the front desk as Lena continues to follow her, intending to ask the librarian on duty about books within the Supernatural reference section. She soon realizes that the librarian is Mrs. Quackfaster, who claims that while she isn't maintaining Scrooge's archives, she works a second job at the library to pay for a retirement Condo in Birbados.
When Webby asks for a book known as Spirits of the Shadow Realm, Quackfaster can't lend her the book because another girl at a nearby table had already checked it out. When Webby approaches the girl, she believes the book would be too advanced for the girl as the book is written in an ancient language. However, this soon leads Webby to start a brief conversation with the girl in ancient languages, after realizing she had met someone who is also fluent with them. The girl then introduces herself as Violet Sabrewing, but is also surprised to notice she is talking to Webby herself, knowing that she has recently been going many of Scrooge McDuck's legendary adventures. This leads Violet to believe that Webby has a vast and fascinating perspectives on the supernatural, much to Lena's annoyance. With Violet's suggestion that she and Webby review the book together later that night, Webby is thrilled to be having another sleepover, but Lena continues to grow her own suspicions.
Later that evening, Mrs. Beakley is seen in the dining room serving herself a small meal of tea and English muffins, knowing she has the house to herself as Scrooge and the Boys are at the money bin for Binventory Day, cataloging treasures for the remainder of the evening. Webby then rushes into the room out of excitement for an upcoming sleepover, much to Beakley's joy for seeing Webby move on from all of the other sleepovers she had involving supernatural disasters. With Webby comprehending that one of those disasters lead to losing Lena to the shadow realm, she refuses to allow another horrible incident be put into play, and instead decides to make the sleepover as normal as she can. She then makes her way around the mansion attempting to cover up anything involving the supernatural, but Beakley attempts to calm her by telling her she simply needs to be herself.
Even so, Webby states to Beakley she isn't her and that she needs friends, much to Beakley's surprise while nervously claiming that she did in fact have her own friends. As Webby takes off, Launchpad approaches Beakley about having just fixed the gate he broke on the way to the mansion. This gives Beakley the opportunity to make a real friendship with someone else, as she invites Launchpad to join her for dinner. Meanwhile, Webby is seen rushing towards her room and stuffing everything she can find involving supernatural in the attic just above her. As Webby hears the doorbell ring, she calls for Duckworth to answer the door, but immediately realizes her mistake of Duckworth being a ghost. She then rushes down the stairs and jumps through Duckworth to get to the door first. Webby apologizes, much to Duckworth's disdain as he then disappears through the roof.
Webby then attempts to greet Violet in a cool-fashioned manner as she leads her through the mansion, but Lena still continues to have her doubts about Violet's presence. She proceeds to introduce her to her room, with Violet then expressing her interest on mystical creatures known as Tulpas from the Spirits of the Shadow Realm book. She states that they are manifestations of powerful emotions including hatred, jealousy, and greed which live in a dark realm adjacent to their own. She reveals the main reason she has an attraction toward these creatures is because she is attempting to research more into what happened the night the shadows attacked Duckburg.
Desperate to stay away from a conversation involving supernatural, Webby suggests they play games such as Baggle and Ice Breakers instead. But when asked by Violet about what she knows about Magica De Spell, Webby throws off the conversation once more and instead shouts to have a makeover session. Meanwhile as Beakley and Launchpad are having pea soup for dinner, Launchpad begins to get anxious about which spoon is the right spoon to use for the soup. Instead he decides to use a swirly straw, but one of the peas in the soup clogs up the straw, leading Launchpad to hyperventilate and fall face-flat on his soup.
With Violet and Webby gone from the room, Lena begins to investigate a mysterious glowing light coming from Violet's backpack, only to realize the light is from the same amulet she lost when Magica had escaped from Scrooge's dime and taken it. She then searches the mansion to find Webby and attempt to warn her about the amulet. But when she does, she finds her in the bathroom with her face all bruised up, only to realize she and Violet are still playing makeover. Webby then believes Violet has made herself look exactly like the demon Rakshasa, but when Violet comes into question about the fangs, Webby accidentally admits she has proof in the attic about the demon having a crooked fang.
Violet and Webby then make their way up to the attic, and with Webby worrying that the things she sees would scare her, Violet instead claims to be fascinated by many of the artifacts, and suggests they try to contact any ancient shadow spirits using dice. Meanwhile, Launchpad and Beakley are sitting together in the living room, with Launchpad believing the reason she is being so nice to him is because she plans to fire him. But Beakley insists she is intending to establish a bond of friendship, and tries to see if they share any similar interests, but none can come to mind for either of them.
Launchpad then notices the masked hero on the cover of the book Beakley was reading, originally believing it to be Darkwing Duck. Beakley then explains the hero of the story being the Scarlet Pimperbill, a masked man protecting the city from harm, similar to Darkwing Duck in Launchpad's mind. After Beakley claims she's never heard of Darkwing, Launchpad decides to show her an old VHS tape featuring Darkwing Duck episodes. Meanwhile, Webby and Violet begin the séance as Violet reads aloud a poem to summon dark shadow spirits. Lena originally believes Violet to have little knowledge of the shadow realm, but takes it back after realizing the poem Violet read gave her the ability to move objects.
Webby and Violet then begin to notice the dice thrown on the floor moving into a particular shape. They originally assume the message the shadow spirit is trying to tell them involves the patterns shown on the dice, but in actuality it was Lena forming a message out of the dice saying "don't trust her." Believing they still require more clarity, Webby and Violet continue the séance, only for Lena to realize that the séance was attracting more Tulpas towards them. She then tries to intervene by covering herself with a nearby cloak and warning Webby to not trust Violet, only for Lena to recognize their inability to hear her speak, and thus leading Webby to believe she was an evil spirit.
Violet begins to attack the floating cloak, and then decides to use the amulet's magic against it, only for Lena to be seen by Webby for a brief moment as she shouted her name. This brings Webby to attack Violet instead after having seen the amulet herself, and demands to know how she acquired it. Violet admits she found it on the beach in the midst of the Shadow War as she was fleeing from any shadows pursuing her. But when the explosion at the money bin happened and the shadows disappeared, Magica's staff flew straight over to where Violet was as it reverted back into an amulet. Violet explains how originally she was never into the concept of magic, but when the shadows attacked her and she discovered the amulet that night, it opened an entirely new world to her of one she was compelled to know further about.
Although Webby begins to feel sympathy for Violet after hearing her words of living a sheltered life, she still warns her to stay away from the amulet after having already lost a friend to the shadow realm. However, Violet instead suggests that they use the amulet to try and bring Lena back from the shadow realm. She believes they could harness the amulet's power to pull her out of it, to which Webby willingly agrees to. Meanwhile, Launchpad and Beakley are seen watching the episodes of Darkwing Duck, with Beakley feeling unsure of all the show's mythological aspects. Launchpad admits its minor density, but suggests they re-watch earlier episodes to help clear it up, much to Beakley's displeasure.
Meanwhile, the next séance with the amulet proceeds as Lena continues to call out her pleas to Webby, and how Violet is merely using her. But when Lena notices Tulpas lurking behind the boxes, they then come together to create a form similar to Magica's shadow. Panicking over the séance being a supposed trap by the sight of Magica, Lena grabs both Webby and Violet's hands and drags them into the shadow realm. Once there, Webby embraces Lena after having finally found her, but their reunion is cut short as the Tulpas begin moving closer in on the three. Lena then expresses her hatred for Violet, believing her to be a thief and a knockoff of herself, and shouts at her to stay away from Webby as she was hers alone.
This, however, leads the Tulpas to kidnapping Webby in the process, as Lena and Violet begin to chase after them. With Lena believing everything to be Violet's fault because of her magic meddling, Violet retaliates by reminding Lena Webby was taken because Tulpas are made of rich desire, and the desire is coming from Lena refusing to be forgotten by Webby. This is only proven further as Lena realizes the Tulpas have now taken her form, and that her jealousy is what's causing them to take Webby away. Knowing that they both had the common goal of keeping Webby safe, they decide to work together and take down the Tulpas.
Meanwhile, Beakley and Launchpad finish watching the series of Darkwing Duck, with Beakley now having grown attached to the show. But after Beakley requests to see the next tape, Launchpad reveals that the show had been cancelled before the finale, much to Beakley's outrage. On the other hand, Launchpad shows her a fan script he had created for himself, with Beakley demanding they film it. Meanwhile as Webby is about to be carried out of the mansion and possibly remain lost forever, Lena decides to sing a magical poem with Violet similar to what she and Webby used to sing.
With the hand of my friend's friend, we bring bitter jealousy to an end. With the hand of my friend's friend, we bring bitter jealousy to an end. With the hand of my friend's friend, we bring bitter jealousy to an end. With the hand of my friend's friend, we bring bitter jealousy to an end!
As they sing, the form of the shadow realm and the Tulpas begin disappearing before them, as they are able to return to the real world. But having taken away the jealousy and bitterness Lena was carrying, Lena herself also begins to dissipate. A downhearted Webby decides to hold Lena's hand one last time with Violet choosing to join in, but Webby's friendship bracelet transforms into a magical swarm of blue misted particles swirling around the three. Once the smoke clears, all three immediately realize that Lena has returned to her physical form, with Webby hugging both her and Violet out of joy.
After the group hug, Launchpad runs into the girls by the entrance asking if they had any more of the smoke bombs he believes they just used. Beakley, meanwhile is seen standing by the stairs in her own Darkwing Duck costume and suggests to Launchpad that they continue with the filming before the boys return home and spoil their fun. Lena, Violet and Webby are then seen giving one another makeovers back at the bathroom, with Webby now realizing that Lena had been with her the entire time since the Shadow War to make sure nothing bad happened to her. With Webby considering the sleepover the best one she's ever had, Violet then proclaims Webby should've stopped her when she had the chance, as now she will use the knowledge she learned to grim vengeance, with Lena seemingly melting right before her. But in the end, it turns out to be a prank set up by Lena and Violet using the makeup, and Webby soon after proceeds to announce them as best friends.
The title may be a reference to the show My Little Pony: Friendship is Magic.
This is Violet Sabrewing's first appearance.
The episode of Darkwing Duck that Launchpad and Mrs. Beakley watch is based on the actual Darkwing Duck episode, “The Haunting of Mr. Banana Brain”.
This episode included the short version of the Ducktales intro.
The Scarlet Pimperbill is a reference to The Scarlet Pimpernel, a story about a man named Sir Percy Blakeney, a wealthy fop who has a secret identity of a daring swordsman and escape artist. Darkwing Duck's striking resemblance to this character is likely a nod to how The Scarlet Pimpernel long predates common superhero tropes and serves as an inspiration for many modern day superheroes, such as Batman.