Sam Truman is a disgraced and unlicensed former private investigator without a proverbial pot to piss in. During a morning mission to scrape up enough bread to pay his rent at the flophouse, Sam intervenes in an attempted robbery and ends up shooting the robber to death with a gun he isn’t legally permitted to possess. In the aftermath of the shooting, Sam is visited by the bloody corpse of the dead robber, which is now being inhabited by the spirit of a murdered woman who charges Sam with the task of solving her murder. Now Sam is up to his neck in a dark underworld of walking corpses, black magic, and Hell’s own army, and all because he agreed to a dead woman’s plea to “Catch my killer!”