As a small boy goes to bed, he checks his bedroom for monsters like Heeby Jeeby, Creepy Critter and the Toe Taster. He looks under his bed, in his cupboard, behind the curtains. Satisfied they are not there he jumps into bed with his teddy bear.
Before saying goodnight to his babysitter, she reads him a story about a boy just like him who tames monsters. "I want to be a Big Boss, just like Max in the story," the boy whispers. In his sleep the monsters appear, but they can't scare the boy as he knows they're not real. The monsters do as they're told by the boy who is the big boss. They jiggle and jive with the boy, just like Max in the story his babysitter read. They wiggle their big bottoms and jiggle their jelly bellies, and beat their hairy chests. They howl and yodel and make lots of noise. But just who is the boss? The boy? Or the monsters? And in the morning, before school, we finally find out who is the real Big Boss!