When Grover gets into a fight with a bully at school, Gemma is torn between her role as principal and wanting to protect her son. Also, Calvin encourages Marty to stand up to his own bully, only to be shocked when he learns who it is.

During a heat wave, Dave accidentally knocks out power to the Butler home with his drone, forcing Calvin and Tina to stay at the Johnson home to keep cool. While preparing to sleep that night, Calvin finds Dave's journal and reads an insulting entry about himself, causing a rift between the two. Meanwhile, Malcolm stays at Marty's apartment and pulls a prank by rearranging all of Marty's beloved collections, but Malcolm gets his comeuppance at work the next day.