The story of a strange long-lost cliffhanger about a woman caught in a web of peril woven by the alter ego of a man she knows as respected scientist Dr. Brutell. Unknown to Madeline Stanton, Brutell is afflicted with a Dr. Jekyll/Mr. Hyde-type malady which turns him into a dangerous super-criminal who uses the power of the "double x-ray" to wreak destruction and commit crimes. Includes a complete plot summary from the ultra-rare original pressbook of the serial, illustrations of the elaborate special effects and cliffhangers, cast biographies and reproductions of original promotional material.