A fisherman catches a sea diver who resembles him, revealing he's a mobster who stole diamonds from his associates. The mobsters mistakenly believe the fisherman is the double-crosser they're supposed to kill, and he must use his wits and the help of a romantic interest to escape the situation.
The Big Mouth
A fisherman on a San Diego beach makes an unexpected catch, a frog-like individual who hands over a map leading to a treasure trove of stolen diamonds, sought after by various criminal organizations.