After receiving an urgent SOS from a work detail on a distant planet, a skeleton crew is dispatched to perform a standard search-and-rescue mission. But when the crew arrives, they find an abandoned site, littered with rotten food, discarded weapons... and dead bodies. As they try to piece together who--or what--could have decimated an entire operation, they realize that some things are best left buried--and some monsters are only too ready to awaken....