The Captain (John Carradine) has bought a group of tourists along in his rusty old tub of a boat. When his boat runs into troubles and hits a mysterious derelict ship, the Captain is killed and the crew and passengers escape to a nearby island. On the island they discover a hermit who becomes very agitated when he learns of the derelict ship. Apparently the hermit is an SS Commander (Peter Cushing) and the ship was supposed to be trapped on the sea bed with it's cargo of zombie SS stormtroopers!
Those zombie SS are emerging from the sea and begin to kill the survivors one by one. The SS Commander tells them the zombies are uncontrollable and have an insatiable need to kill. A battle for survival ensues.
The zombie SS are rather slow moving but undeniably creepy, they are also unstoppable and relentless. The survivors including Brooke Adams and Fred Buch are varying degrees of annoying but play their part in this rather decent zombie horror.
