Lieutenant Travis Daniels and his soldiers, having just narrowly escaped death from Martian security forces, must race against time to prepare the transport ship for their return to an embattled Earth. Travis will brave the journey through space while his wife, Annie, struggles to keep their son alive. Everyone must do what is necessary to survive while the newly dominant creatures of Earth seek them out, hunting down the last of humanity without prejudice. Travis and his soldiers must land safely and travel the ruined planet, in hopes of finding his family before it's too late.