

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.
The Crimson Stain Mystery was directed by T. Hayes Hunter.
The Crimson Stain Mystery runs for 5h 55min, and was released in 1916.
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