The Chipmunks, Alvin, Simon, and Theodore, have grown accustomed to living with and driving Dave Seville crazy for about 8 years. However, when Dave starts dating, the trio becomes anxious about being replaced and decides to take drastic measures to prevent him from popping the question.

Alvin and the Chipmunks: The Road Chip
The Chipmunks worry that their loving father, Dave, is considering a move to Miami with his new girlfriend, which could mean leaving them behind and introducing an unwelcome stepbrother into their lives.