After a concert mishap lands Dave in the hospital, Alvin, Simon, and Theodore end ... Ian Hawke. The Chipmunks and the Chipettes square off; romantic sparks and crazy mishaps ensue.

Join Alvin and his brothers Simon and Theodore for this hilarious Halloween adventure. Alvin wants to be accepted into the Monster Club, but the Monster members seem to think its cool to be cruel.

Alvin, Simon, Theodore have been living with ... To save their relationship with Dave, the Chipmunks must find a way to stop him from proposing.