The Chipmunks and the Chipettes go head to head in a hot air balloon race, and the winner gets $10,000. Unbeknownst to the participants, the "race" is actually a diamond smuggling ring!
The Chipmunk Adventure is a 1987 American animated musical-adventure comedy film based on the Saturday-morning cartoon series Alvin and the Chipmunks and the Alvin and the Chipmunks virtual band and media franchise created by Ross Bagdasarian Sr. The film was directed by Janice Karman and written by Karman and Ross Bagdasarian Jr. As the events of the film take place between the fourth and fifth seasons of Alvin and the Chipmunks, the plot follows the Chipmunks and the Chipettes as they go on a hot air balloon race around the world while their guardian David Seville is out on a trip, not knowing that it is a cover for a diamond smuggling ring. The chipmunks travel through a series of adventures in different countries while being hunted down by the diamond smugglers, Claudia and Klaus Furschtein.