On an underwater 'safari' in Florida's dense swamplands, Mike is suddenly gripped by a massive electric current and nearly loses his life. Recovering, he learns that a poacher is using electric shocks to kill all the fish in the area.
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.'
