1950 film directed by José Luis Sáenz de Heredia

1956 film by Pedro Luis Ramírez

Upon arrival in Barcelona, Miguel is fired from his job as a sailor and the financial problems which he will face from that moment will gradually introduce him into the world of crime. The little money they his wife Ines had previously saved , thanks to her hard work, will be quickly squandered by him.

The strange disappearance of the dogs of his neighbors leads Juan to investigate the case on his own. It ends up finding out that the author of the robberies is a young woman called Eloísa, the cocky daughter of a scientist who uses dogs to create an antidote against sleep. Juan and Eloísa fall in love, but he will ask her to leave her luxurious mansion to live only with his salary.

By chance, Miguel el Tarta becomes a potential boxing champion. Manipulated by Manolo, his opportunistic and cynical best friend, and several unscrupulous individuals, Miguel is thrown into the ring, where he tries to fight with more enthusiasm than technique.