
In their latest adventure, through a series of misunderstandings, Alvin, Simon and Theodore come to believe that Dave is going to propose to his new girlfriend in Miami…and dump them. They have three days to get to him and stop the proposal, saving themselves not only from losing Dave but possibly from gaining a terrible stepbrother, Miles, played by Josh Green.
The idea of Dave tying the knot doesn’t thrill the boys; in fact, they fear it’ll uproot their lives – and maybe uproot them from Dave’s home! Further complicating matters is Sam’s (Dave’s special friend played by Kimberly Willams-Paisley) teenage son, Miles (Green), who has an instant dislike of the Chipmunks.