After many years away sailor Hannes Wedderkamp returns to his home city of Hamburg and meets up with his old friend Pittes Breuer who owns a venue on the Reeperbahn. Currently struggling, Hannes helps him turn it around by introducing a new revue. He also takes a kindly interest in his friend's grown-up daughter, only to discover that she is in fact really his own child who has been brought up by Pittes. When the two men fall out shortly afterwards, Pittes gets mixed up with an unscrupulous con man and Hannes pulls out all the stops to save him.