Preschool stop-frame animation about Lunar Jim, who lives on the second-to-last moon of the Milky Way. Jim, Rover the robotic dog, space mechanic Ripple, space farmer Eco, Ted the clumsy robot and Pixel the main computer enjoy extraterrestrial adventures. When Rover goes missing, Jim and Ted are hot on his trail and find not only the robo-pup but also a fabulous lunar playground. Jim has to rescue Rover when he gets trapped in a cave.