Simon's gentle schoolmate Stan sleeps over but has a horrid nightmare. Simon promises to keep his friend's secret but big brother Matt, who already suspected the boy's weird sister Karen 'Babydoll', spills the beans to dad, who informs the incredulous parents she's in a street gang. The girls fuzz about mall shopping, and Lucy's secretive romantic reason.

Simon discovers friendly, generous old neighbor Charlotte Kerjesz has concentration camp tattoo. Eric forbids Simon to ask her to help for a history assignment but realizes his son is right after hearing classmate Larry's father spreads holocaust denial. The Camdens are excited to meet Joanne, Matt's first girl since Heather dumped him. Considering her 'too perfect', jealous Lucy and Mary decoded flippantly to hate and ignore her. Joanne overhears them and dumps Matt over his lousy siblings, which stands even after apologies.