JimJim and his mouse family live near Sylvan Lake, high in the Rocky Mountains. Trapped in a backpack, the mice find themselves in Las Vegas. They have exciting times, but get swept outside into the street by accident. The mice are attacked by alley cats, visit many places in Vegas, learn new dances, make new friends and learn karate. Follow JimJim and JoeJoe as they survive Vegas and find a way to return to Sylvan Lake with the help of their new friends.