Playing around while aboard a cruise ship, the Chipmunks and Chipettes accidentally go overboard and end up marooned in a tropical paradise. They discover their new turf is not as deserted as it seems.

Inspired by true events, 'Grace of the Gun' tells the captivating story of Crawford Goldsby, a young man paving his future in the Old West, who accidentally shoots the sheriff of his hometown. He is forced to abandon his home and fiance, Maggie Glass. After a run-in with the notorious Cook brothers, Crawford joins them on their criminal enterprise, further separating him from the possibility of ever returning to his past life.