After celebrating his birthday with a trip to the movies, 15 year old August takes his girlfriend back to the toy shop where he works to show her the owner's latest creation, a cool new train set and model city. But when he turns on the train, something extraordinary happens. Suddenly the two teens are zapped down in size and find themselves passengers on board the speeding toy train! Scared and mystified, the pair discover they have been trapped by the toy's evil mastermind, the diabolical Mr. Dalby, and unless they can figure out how to escape, and fast, they are doomed to ride the miniature rails forever!