A WWII Japanese ship transports POWs to occupied territories for slave labour. Onboard the ship is Saito, a traitor sentenced to death, shackled to Bronson, a British soldier. When the ship is torpedoed Saito and Bronson are thrown overboard and wash ashore a deserted island. But they are not alone. Bronson and Saito are hunted by a monstrous creature - the Orang Ikan. Bronson and Saito must put aside their hatred for one another to survive the island and kill the creature before it kills them.