Ralph Schuyler is a government agent who goes undercover as a boat captain to spy on Felice Greer, the wife of an international embezzler hiding out in Mexico and she's presumably coming down to him with the stolen money. Kimble happens to be on the boat too as a hired deck hand. When Ralph learns that Kimble's identity is false, he takes Kimble's fingerprints and after an 'emergency' landing, the agent leaves the fingerprints with a local Mexican shopkeeper and notifies the authorities of Felice's whereabouts. But when Ralph is badly burned in a engine room fire, Kimble tries to save him and takes over the boat's steering to safely make it to their destination. But when Kimble intercepts a cable with the incriminating report on his fingerprints, Kimble is torn between fleeing or staying to help Ralph, while Kimble also discovers that Felice's husband is up to no good concerning the stolen money.