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In attempting to develop a chemical which would make a person super-intelligent, Dr. Montrose fails and the subjects of his experiments metamorphose into hideous monsters who band together and prey on humans. With the police stymied, a young detective attempts to track down the leader of the group of killers, known only to have a small crimson stain in one eye.

Status: Released
Released Date: 1916-08-21
Runtime: 355 mins
Director: T. Hayes Hunter
Writer: Albert Payson Terhune
Spoken language: No Language
Genres: Mystery, Horror
Original title: The Crimson Stain Mystery
Production Companies: Erbograph Co.
Production Countries: United States of America