Penniless and destitute, Conan finds himself imprisoned and bound for the gallows until a young nobleman named Murilo offers him a deal - his life in exchange for the assassination of a devious political rival, the Red Priest, Nabonidus. But their deadly plan goes terribly wrong as Conan and Murilo find themselves trapped in the labyrinthine halls of the Red Priest"s fortress-like home, dodging a series of intricate traps, and stalked by a brutal and mysterious creature.