In this adventure, an American is forced by smugglers to sail his boat from Barcelona to Tangiers. The ruthless fugitives then kill his son, and harm his shipmate, sending the pilot, himself an ex-smuggler into such a rage that he kills two gang members and helps police capture the survivors and bring them to justice.

A young policemen witnesses a bank robbery which will become his first case. To catch the thieves he will infiltrate himself as one of the gang members. At first it works, but it won't be so easy afterwards.