May, 1942. World War II rages across a divided globe and a Japanese Hell Ship transports prisoners of war to occupied territories for slave labour. Onboard is Saito, a traitor to the Japanese, and sentenced to death. As further punishment, Saito is shackled to British soldier and Japanese hater Bronson. Torpedoed by Allied submarines, Saito and Bronson are thrown overboard and wash ashore a deserted island where they are hunted by a monstrous creature – the Orang Ikan. Bronson and Saito must put aside their enmity to survive the island and kill the creature before it kills them.