While putting up Shaggy's papers for his morning route, Scooby runs into a green monster that steals Shaggy's bike. The gang traces it to a haunted house where they find a room full of counterfeit money.

The Coolsville bank is robbed. The janitor says that he saw a monster in the vault but nobody believes him and he is accused of the robbery. He's proven right when Scooby finds the monster inside his doghouse.

At the Scooby Snack factory, where Scooby's food is being made a strange accident occurs at the cheese lab. The workers are all chased away by a strange cheese creature demanding that Scooby Snacks stop being made.