Plot
As the radio reports a UFO sighting, the Sea Devils, out in the boat Sea Witch, meet a giant "King Neptune" spearing boats from a giant sea horse. The sunken UFO's recorded message warns that Horro was a dictator on Venus banished to space. The Sea Devils dodge the mad giant until they can steer a dud torpedo into him. Whroom! But the Sea Witch was sunk, their transportation gone!