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!; Having lost their boat, the Sea Witch, the Sea Devils enter a millionaire-sponsored underwater scavenger hunt to win a new boat. They find a life ring from the Marie Celeste, a jeweled sword, and other treasures, but lose them through mishaps. Then the prize boat is highjacked by the Black Mantas, and the Sea Devils swarm aboard and rescue the millionaire sponsor - and win the boat! The Devils then tell the reader this was their last dive, so if you want more adventures, drop a card to Sea Devils, National Comics!; Historical piece about Alexander the Great's use of "combat divers".