

A fire breaks out and Lorca's lab explodes. Marla, who was Don Ramon's lover, leads him to Dr. Lorca has been experimenting on the islanders, including Don Ramon, who was dying of cancer but was turned him into a monster by Lorca's serum. Sheila follows him before she is attacked by a monster who butchers one of the natives. The next day, Willard goes into the jungle to watch Marla swim. One night a native with green sores on his body tries to break into the government house but gets away. Lorca and his assistant Razak (Bruno Punzalan) head into the jungle, looking for something. Marla (Alicia Alonzo) drops some hints about Don Ramon, much to the annoyance of Carlos' mother. Lorca (Ronald Remy) doesn't tell much about Don Ramon Lopez's death.

Carlos' mother doesn't want to leave the island, even though her husband is dead. Sheila finds her father (Tony Edmunds) to be a hopeless drunk. The captain of the ship claims that the island is cursed and tells a story of a man they picked up on a raft who bled green blood. A ship arrives at Blood Island carrying American pathologist Bill Foster(John Ashley), who is investigating the discovery of green blood Sheila Willard (Angelique Pettyjohn), who has come to find her father and Carlos Lopez (Ronaldo Valdez), who wants to get his mother, Mrs. A woman running naked through the jungle is killed by a man-like creature.The synopsis below may give away important plot points.
