In this episode, Alvin's first day at summer school ends with an embarrassing, if somewhat titillating, run-in with a half-naked Rachel in the girls' locker room, and a rather strange gesture from Tamara, who manages... to disturb her brother in more ways than one at the same time. The next day, Alvin is surprised to learn that Ms. Walsh has actually been retained as the class "instructor", despite not really wanting to teach anybody anything - and as if that wasn't enough, Henry the School Idiot opens up a really nasty secret about Dennis, which clearly prompts for action, but which action, Alvin isn't really sure...
