An ancient Japanese mummy is awakened by a bolt of lightning, and sets out to re-create its tomb, including the three concubines buried with him. While working to capture it, Benson finds herself taken captive by the creature, which plans to sacrifice her---and two other women.

While they hunt a monster made up of human fat residue, Nick and Kate deal with Nick's former partner, Rich, who wants in on the case. To complicate matters, Rich is charged with a murder that the monster committed.