When Captain Justin Thorn is hired to transport equipment and supplies to a mining colony on the moon, he knows it could be dangerous. He doesn't expect that someone will try to kill him. When they arrive on the moon, Thorn and his crew discover a shocking secret that could jeopardize all life on earth. On their return trip they find that their ship has been sabotaged, leaving them unable to return to Earth without burning up in the atmosphere. Trapped in orbit and with time and air running out, they attempt a daring maneuver that could save their lives, if it doesn't get them all killed.