While his mother gets ready upstairs, a boy is waiting for delivery of a great big pizza with extra cheese. When the doorbell rings, it isn't the pizza guy it's a gorilla! Without even being invited in, the gorilla heads straight for mischief. He dumps out the boy's toy box, colors on the walls, kicks soccer balls in the house, and makes a giant mess in the kitchen. And that's not even the bad news! While all this mayhem is going on, the real pizza boy comes, and the gorilla doesn?t leave any for the family!