At the Loud House, Lincoln (holding an Ace Savvy comic and in his underpants) asks Lynn if she wants to read it with him. She refuses because of three reasons: A) comics are boring, B) she tells him to put pants on, and C) ya later. Downstairs, Lincoln is about to watch a DVD, when Luan walks up next to him with Mr. Coconuts. He asks her if she wants to watch it with him, but denies, saying sci-fi stinks. He later comes to Lola, and shows her his coin collection, as well as the new coin he had just gotten from Poland. Lola just says it's lame, and asks him what's the point of the coins if he's not going to spend it. Later, Lincoln wants to invite Lucy to go ghost hunting with him, but she disagrees, saying that ghosts are her friends. In the kitchen, Lincoln asks Lana if she wants half of his peanut butter and sauerkraut sandwich, but Lana refuses, since she of all people says it's gross. As Lincoln plays a video game, Leni walks by, and Lincoln asks if she wants to play with him, but denies, saying that video games will "rot your brain".
Unhappy with all of these refusals, Lincoln explains to the viewers that none of his sisters share any of his interests, even Lily. Lincoln hands Lily a controller, and she begins to play with it, much to her delight. Seeing this, Lincoln realizes that he can make Lily like the stuff he likes. Clyde arrives, and asks Lincoln if he wants to hang out with him, but Lincoln tells him he's doing something important (which is "changing" the baby). Later, Lincoln begins doing all the various activities his sisters turned down with Lily, all while Clyde spies on them, making the assumption that Lincoln is replacing him. After winning a chess match, Lily wants her blanket (or "blankie' as she likes to call it), but Lincoln, thinking that Lily is fully changed, throws it away, claiming she doesn't need it anymore. Back at house, Lincoln and Lily (wearing one of the former's polo shirts) are playing video games. The other sisters arrive, and Lori asks what they're doing. Lincoln explains that he's implementing his interests into Lily, since none of them like the stuff he likes, much to everyone's surprise. Later at night, Lincoln reads an Ace Savvy comic to Lily so she can go to sleep.
The next day, Lincoln, ready to have another fun day with Lily, checks if she's awake yet. However, Lincoln discovers that Lily is gone, and realizes that she's outside, where Lynn is playing baseball with her. Lincoln reprimands Lynn for doing something potentially dangerous with Lily, but Lynn proclaims that he's not the only one allowed to mold Lily. During their bickering, Luan has taken Lily, and is now using her as her new dummy "Lil-Lil". After cracking a couple jokes, the three begin fighting, only to stop when they realize that Lily is missing. It turns out that Lucy had taken her, and is showing her how to act like a goth, provided with photos of Great Grandma Harriet, and Abraham Lincoln. Lincoln, not wanting Lily to be with Lucy, takes her away. After wiping off Lily's face makeup, Lincoln is prepared to give Lily one of his shirts, but upon turning around, Lily vanishes once again. This time, Lori has taken Lily, and is showing her a dating show she likes to watch. Lincoln confronts Lori, and demands Lily back, but Lori refuses, saying that she has always wanted to be with someone with the stuff she likes. Their argument is cut short when they hear Leni screaming. Alarmed, both siblings run upstairs to Lisa and Lily's room, and discover Leni in Lily's crib. She explains that she going to show Lily her fashion magazines, but in the process, got into Lily's crib, and now believes she's in jail. As Leni cries in despair, Lincoln and Lori, annoyed at Leni's foolish beliefs, help their sister out of the crib, to which she gracefully thanks them. Suddenly, they hear a menacing laugh. It turns out be coming from Lisa, who has rigged Lily to a potentially dangerous device, which Lily is completely clueless about. Just as Lisa is about to flip the switch, Lincoln shuts the machine off, and reprimands Lisa for nearly killing Lily. When Lisa tries to defend her actions by saying that she was going to give Lily a lollipop afterwards, Lincoln, now fed up, tells his sisters to stay away from Lily, since he had her first, but they remind him that Lily is missing once again. This time, Luna has taken Lily, and is letting her play with her drum kit. Luna prepares to stage dive onto Lily, but the others tackle her before she crushes Lily. Once again, Lily disappears, and it is shown that the twins have taken Lily. However, the twins begin to fight when Lola wants her to join her tea party, and Lana wants her to play with her pets. The others arrive, and one by one, explain what they've been doing with Lily (with Lucy telling Lori that she knows that she [Lori] regifted a brooch that once belonged to Great Grandma Harriet, and that she's not happy about it). Soon enough, the sisters being to fight for Lily. During their fight, Lincoln grabs Lily, and attempts to sneak away with her, but their sisters catch him sneaking out with Lily. Caught, Lincoln makes a run for it, but ends up in a game of cat-and-mouse with his sisters, each one grabbing hold of Lily. When the sisters begin to brawl for Lily again, Lincoln whistles for them to stop. He explains that they all have similar intentions to make Lily like the stuff they like, but says that there's only one way to settle their dispute: let Lily choose.
In the living room, the siblings agree that whoever Lily crawls to, they gets possession of her. They each pull out their respective belongings, and begin to bait Lily with them. As Lily become more and more stressed at her siblings' bribery, an angry Clyde barges in, still thinking that Lincoln is replacing him with Lily. Clyde tries to win back Lincoln by dressing up as a baby himself, much to everyone's shock. To everyone's astonishment, Lily crawls over to Clyde, but before he can berate her for trying to "steal" Lincoln away from him, Lily grabs the blanket he's holding, revealing it's her blankie. Seeing Lily cuddle with her blanket, Clyde, unable to resist Lily's cuteness, hugs her. When Lincoln questions why Clyde's wearing a diaper, he explains that he thought he was trying to replace him, but Lincoln says that he would never replace Clyde. When Lincoln sees how happy Lily is with her blanket, he realizes that he and his sisters can't mold Lily, since she'll want the one thing she loves most. When Lincoln asks Clyde if they want to hang out, Clyde declines, wanting to spend time with Lily.
Lori, fearing about what Lucy told her earlier, calls up Bobby, and asks if his mother still has the brooch she regifted. Lucy, hearing their conversation, smiles with satisfaction, knowing that she finally got Great Grandma Harriet's message to Lori.