A great grizzly bully is no match for the Dog Detectives! The Great Rocky Cycling Challenge is about to start but all of the bikes have gone missing! The Dog Detectives must find them so that the race can go on. But that's just the start of their problems ... The bikes were stolen by a mean, grizzly bear who will win the race even if he has to cheat. The Dog Detectives manage to beat him and the race goes on.