Caison is only an Initiate with the Pathfinder Society, but necessity and secrecy requires him to join a detachment tasked with solving the mystery of a group of missing Pathfinders. He's been told not to trust anyone. Once he boards the missing Pathfinders' beached ship, he finds clues to the mystery. However, determining the importance of those clues will have to wait. First and foremost, Caison needs to survive.