
Six brave fourth-graders at Third Street School make it their mission to protect the other kids on the playground. Despite the rule of King Bob and his minions, who enforce his unwritten laws, T.J, Ashley, Vince, Gus, Gretchen and Mikey seek a rational balance between conformity and individuality.

King Bob chooses Gus to hold the fort for him while he's away, but the power goes to his head; Vince is Mr Cool, so everyone's shocked when they discover his brother is a nerd.

Gretchen does well on an IQ test, so the principal wants to send her to a special school; Speedy, the school hamster, dies and the gang arranges a funeral.

Vince questions his kickball ability; a strange boy seems to bring bad luck.

Geoffrey annoys Gretchen; savage kindergartners kidnap T.J.