Kapp Adams, an ex-astronaut jaded by life on Earth, is offered the chance to investigate a strange object discovered on the Martian moon Phobos. He and his crew embark on the mission of a lifetime, but when a series of disasters leaves them stranded, they must find a way back home, where they and a group of unbelievable allies are faced with the threat of a much different Earth than the one they left behind.
