Island atmosphere with tropical music and friendly natives. An idyllic setting for a group of adventurers to find some peace. A doctor (Kent Taylor) and his horny wife (Beverly Powers) and a peace Corps volunteer (John Ashley) journey to this Philippine island to help and do research.
Unfortunately, things have changed and danger lurks. Has radiation from atomic tests in the 40s drifted to the island causing mutations? The fact that trees can attack like Harry Potter's whomping willow is some indication that things are not normal.
The natives have returned to previous customs by sacrificing naked virgins to be satisfied by someone or something; it certainly was some hideous creature! They stay with a strange man (Mario Montenegro), who has a staff of little people in his home. He also appears some 20 years younger than he actually is.
When it is time for the chief's granddaughter (Eva Darren) to be sacrificed, Jim (Ashley) swings into action to save her.
Later, Carla (Powers) is really desperately looking to get laid and follows Estaban (Montenegro). She meets the Tiki-headed monster instead. He will certainly ravish her, but not in the way she wants.
Of course, the finally defeat the monster by finding the cajones that had put aside.