Zack's father gets an invitation to a bachelor party. Zack tries to impress his schoolmates by saying the invite is to him, but Zack's father says he can't go. Zach meets a girl while running and gets a date with her for that evening. Later, Zach gets an invite to the party, but has to lie to break his date with Stephanie. That leads to a surreal dream sequence where Zach imagines what the party will be like.; Jessie rebels when she is assigned to find a living thing, like a plant or pet, and nurture it for two weeks. The project is then kept secret and when the boys overhear references to "mom," secret," and "serious problem," they assume Jessie is pregnant. Zack tells Jessie's parents and they rush to find Jessie, who has adopted a tiger cub for the project.