When Terran space explorers agree to dispose of an abandoned stellar craft, they find numerous alien corpses inside, and one ghost.
In order to escape, the Terrans must learn the workings of the ship. The ghost tries to kill them via spontaneous combustion, offworld narcotics, drowning in alien viscera, high-tech disintegration, and common beatings. Though severely injured, Parno and Kathlynn are healed by the ship.
When the entire ship begins disintegrating, Parno and Kathlynn are forced to face the ghost. If they fail, they and the ghost will achieve unending peace.