(Some Spoilers) Thrown out of the prestigious Vienna Medical Academy for his illegal experiments Dr. Peter Blood, Kieron Moore,is now back home in the lovely and scenic coastal town of Port Carron England to continue his work undercover and underground.

Using his fathers position as the town doctor Robert Blood, Ian Hunter Peter builds a laboratory in the deserted coal mines outside the town to do his business undisturbed. While vacationing in the South American jungles Peter discovered the drug Curare from the local native tribesmen and has been using it in his experiments in his theory of eternal life. A brilliant but arrogant student Peter felt that he's smarter then all the professors and teachers in the academy put together. Which lead to him being run out of town, Vienna, on a rail.

Still not learning his lesson Peter is back on the road to destruction with him kidnapping people in and around town and after knocking them out working them over, in his secret lab,by taking organs out of one and putting them in another to keep the one receiving the organ going until he needs a new transplant. Looking and acting normal on the outside the tall dark and handsome Peter attracts, his fathers Dr. Robert Blood's assistant, pretty nurse and recent widow Lnda Parker, Hazel Court,who at first falls in love with him.

Peter putting on an act that he's in love with Linda takes her to his secret lab in the coal mines to, what seems to me, knock her out put her under the paralyzing drug Curare. Peter then use her in his experiments of involuntary organ donations. Lucky for Linda Peter's mad scheme is interrupted by the local town hobo Tregaye, Fred Johnson, who unknowingly to himself, and Linda, saved her life by popping up just at the right time.

Actually the brilliant Peter didn't come across that smart at all in the movie with all his experiments falling flat on their faces. All of Peter's victims from mine inspector George Beale, Andy Alston, to the local town undertaker old man Morton, Gerald Lawson, to the before-mentioned hobo Tregaye didn't produce the results that he hoped for.

In the end Peter ended up being the victim of one of his experiments that went very wrong for him but just right for the town and people of Port Carron. That experiment finally put and end to his insane actions once in for all.