A young girl's love for a tiny puppy named Clifford makes the dog grow to an enormous size.

Through a series of misunderstandings, Alvin, Simon and Theodore come to believe that Dave is going to propose to his new girlfriend in New York City - and dump them. They have three days to get to him and stop the proposal.

A group of suburban biker wannabes looking for adventure hit the open road, but get more than they bargained for when they encounter a New Mexico gang called the Del Fuegos.