A man from Manila, who deals in antiques, falls victim to an ancient Satanic curse, as a result of his wife joining a cult. To set things straight, he seeks help from a local historian.
After El-Carim, a ruler, plans to capture Sinbad, Princess Jana gets worried and pleads with a magician to turn her into a small bird so that she can fly to Sinbad and inform him about the danger.
Paul Lavond is framed for murder and robbery by his associates and sent to the Devil's Island. Years later, when Paul escapes with the help of a scientist, he vows vengeance on his associates.
Nuclear testing awakens a monstrous octopus of epic proportions near the Philippine Trench. On a rampage, the monster moves towards the North American Pacific Coast.