Private investigator Harry D'Amour is drawn into a world of supernatural phenomena while working on a routine insurance case in Los Angeles. He stumbles upon a brutal murder that leads him into the dark and mysterious world of phony illusionist Philip Swann. When Swann's wife, Dorothea, hires Harry to look into her husband's strange past, Harry discovers that Swann was once part of a cult led by Nix, a powerful sorcerer who promised to teach his followers the secrets of true magic.

As Harry delves deeper, he uncovers that Swann and a group of disciples had previously overthrown Nix and buried him in the desert, fearing his immense power. However, the cult's remnants have been conspiring to resurrect their master and bring chaos to the world. With sinister forces at play, Harry must navigate a series of dark rituals, dangerous traps, and magical confrontations to uncover the truth about Swann's illusions and Nix's plans. Harry's journey tests his resolve and courage as he confronts unimaginable horrors within the world of dark magic.