Dr. Matthew Thorne, losing his medical license and forced into becoming the crime doctor by his younger brother, crime boss Rupert Thorne, must perform delicate surgery on Rupert. He can't do it alone, and kidnaps Dr. Leslie Thompkins to assist. Batman discovers Leslie's disappearance, and rushes to track her down - and has an additional interest in Matthew, because he was a medical school classmate of Bruce Wayne's father Thomas.