Stan sets out to stop a tree that he considers his father from being cut down. Steve realizes he's stopped growing and considers surgery.

Francine falls in with a group of tough girls after becoming the new school guidance counselor. Jeff panics when he loses his hat.

Stan has to take over Roger’s different personas after a tumor takes him out of commission. Principal Lewis pressures Steve and the school choir to do whatever it takes to win.

Steve goes undercover as a school hall monitor; Roger and Stan go catatonic after witnessing a grisly escalator accident.

Thanks to Roger, Snot discovers his dead father was a demolition derby driver. Hayley takes Steve on a road trip, so he can learn to drive.

Steve wants to know about the Smith Family heritage, but Stan refuses to indulge him. Stan is obsessed with being American and tells Steve that being American is all that matters. Steve steals Stan's DNA for an at-home DNA test and discovers that they are Canadian. Steve rejoices in finally knowing his heritage, but the news devastates Stan.

Francine insists that Steve let her help with his school project, Stan finally fixes that shingle, and the rest of the family goes on a quest to return Gallagher's mallet.