Ron Gorton

Bat Masterson, frequent target of gunfights, falls into the sights of Harry Varden's trigger man. Varden, biggest saloonkeeper in Dodge City, fears that Bat plans to relieve him of some property - and he figures his only recourse is to eliminate Masterson.

Playboy sportsman Elliot Conway and his wife Gloria employ Mike Nelson to teach them skin-diving and guide their underwater "safari" for sharks in the waters off Peru. Mike fights a school of hungry sea beasts to save the lives of his "pupils."

Latin American revolutionaries seek Mike's help recovering a murdered opponent's body from the palace lagoon so as to have incriminating evidence. But as Mike investigates, another rebel is mysteriously killed, deepening the conspiracy.