A new girl, Samantha Stanky, moves to Springfield, and Milhouse falls in love with her. Bart is shocked when he sees Milhouse and Samantha kissing in his treehouse. Meanwhile, Homer orders a subliminal weight loss tape, however, they send him the vocabulary builder tape. Unaware, Homer listens to it in his sleep and subsequently uses big words all the time.
To Bart's dismay, Milhouse and Samantha spend all their time together. To get his friend back, Bart tells Samantha's father, who sends her to an all girls school. Homer gains weight and so throws his tape away, leading to him forgetting even the most basic words.
Feeling guilty, Bart tells Milhouse he snitched and they fight. Later, they both go to the girls school where Milhouse and Samantha share one last kiss.