An unnamed United States Marine is airdropped onto a tropical island on a top secret mission to stop the evil Dr. Hellman, who plans to release his army of zombies on the world. He is bitten by a zombie and also meets an attractive female reporter and a Rastafarian male driver. Four of the marine lieutenant's comrades are captured by Hellman and turned into zombies. To rescue them, the lieutenant infiltrates Hellman's compound and shoots each of them with bullets coated with extract from Datura plants, which can turn freshly-created zombies back into humans.