Chuck Grimshaw works hard in the gruelling environment orbiting Mars. Long days fixing broken equipment, on a worn out ship, in a stinky spacesuit. His two robot helpers, Daisy and Maisie, make things bearable. Never short of a wry observation or a correction to Grimshaw's work habits. When disaster strikes, Grimshaw finds they have more talents than just quips and repairs. But do they have the skills to help him survive?