Jeff Bailey seems to be a mundane gas station owner in remote Bridgeport, CA. He is dating local girl Ann Miller and lives a quiet life. But Jeff has a secret past, and when a mysterious stranger arrives in town, Jeff is forced to return to the dark world he had tried to escape.
Sketch artist Irena Dubrovna (Simone Simon) and American architect Oliver Reed (Kent Smith) fall in love and marry after a brief courtship. But Irena believes that she suffers from an ancient curse and won’t consummate the union for fear that she will turn into a panther compelled to kill her lover.
A chance discovery leads American mining engineer Ben Harris and acquaintance Harold to discover a lost city under the sea while searching for their kidnapped friend Jill. Held captive in the underwater city by the tyrannical Captain (Vincent Price), and his crew of former smugglers, the three plot to escape…