On his first day of middle school, Sam learns that he is moving up a grade and into his older brother's homeroom.

Sam is forced to reveal that he does not know how to ride a bike when he is asked to join a bike relay team; Sam gains a new confidence when he gets his first chest hair.

Sam and Tyler compete to catch a cricket; Sam's friendship with Glenn becomes strained when he begins spending time with his new seventh grade classmates.

Sam impresses his classmates with an epic birthday party, but his extravagance leaves him unable to pay the bill; Tyler convinces Carter to revive their old martial arts act in hopes of earning a spot on a television talent show.

Sam directs the homeroom's class film; an argument between Tyler and Sam pushes Tyler to join a rival homeroom.

Tyler and Sam sneak into their old elementary school fair; Tyler discovers Gigi, Dallas, and Sophia's secret dance club.