The Rovers have to find a stolen device that could destroy the world. They are pitted against a new enemy, Captain Zachary Storm, a militant who was discharged from the military and is now out for revenge.

A small dog from San Francisco witnesses the kidnapping of his master! The Rovers find and rescue him, and he is trans-dogmified to go to court to testify with the aid of the Road Rovers, who have no idea what they are in for. Will they be caught themselves?