Returning to Blood Island, a ship catches fire and explodes after its crew is slaughtered by the gruesome half-dead, green-blooded Beast of Blood. The horrendous creature washes ashore and terrorizes the island inhabited by the mad Dr. Lorca (longtime Philippine star Eddie Garcia), who attaches heads to a hulking headless body and makes life miserable for our heroes, two-fisted John Ashley and beautiful Celeste Yarnall (of Elvis Presley movie fame). The couple journeys to the forbidden Valley of Doom, filled with Lorca's hideous failed experiments, where a monstrous climax explodes in a cataclysm of unforgettable horror!
A ship is attacked and its crew butchered by the half-dead Beast of Blood, causing the wretched creature to wash ashore and victimize an island ruled by the insane Dr. Lorca. Dr. Lorca has a penchant for attaching heads to lifeless bodies, and proceeds to make life very difficult for our heroes, played by John Ashley and Celeste Yarnall. The couple enter the Valley of Doom and encounter numerous creatures that Lorca has disposed of, causing blood and gore a-plenty in this entertaining 70s schlock horror.