When Lisa puts an experimental mix on Lincoln's cereal, he can pass across walls and people, but now he can't be heard or seen.
All starts at a Sunday morning. Lincoln is eating a bowl of Zombie Bran while watching TV. When he goes to the bathroom, Lisa takes the opportunity to mix his cereal milk with an experimental formula that she prepared. Lincoln returns from the bathroom, Lisa had gone. Some minutes after Lincoln ended his Zombie Bran, the mix starts to have effect. When Lincoln tries to grab the remote, he notices he can't. He can't touch any things, only passes across them. He sinks in the couch. Lincoln 'flies' stairs up (because his feet don't work anymore). He goes to Lisa's room and he asks what she had done. But Lisa can't hear him, because is now a ghost, so Lincoln wears some things to be partially seen and heard. Lincoln tries again, this time Lisa answers she mixed his milk with an experimental formula in which she had worked. Lincoln tells her to make an antidote. She'll go to make it, but it will take some time, time that Lincoln approaches as a ghost. He quits his things off so can't be seen, only wears a small bowtie to be heard (the more things he wears, more visible is seen, but only one thing is needed to be heard). First, he goes to annoy his other sisters. He makes things such stealing Lola's tiaras, making Luna's guitar 'float', hiding Leni's makeup, and others. When he goes to Lucy, she tells he's a ghost. He already knows it, but the question is: how she knows it. Lucy explains him she's using a Ouija to communicate with him. Lincoln starts telling in the Ouija why he's a ghost (he uses the Ouija to be a 'formal' paranormal event). When he ends, Lucy goes to tell Lisa to make an antidote for Lincoln, she tells Lucy that she's already working on the antidote, and that will take at least three hours. Lucy tells Lincoln that he can make some naughty acts in three hours. He goes to the street and puts some cones on the way, detouring all vehicles, and desynchronizing the school's clocks. Three hours later, he's back to home, and Lisa finished his antidote. Lincoln needs to be visible so she can put the antidote on him. He wears a lot of clothes, and Lisa puts the antidote on him. He's visible again, so he goes to his room, only to be surprised by Lola, because she knows where are her tiaras. She makes Lincoln go to the roof to take down all the things he robbed.
- The scene where Lincoln annoying his sisters was used in the second season episode, Lincoln's Book.