The plot reflects the figure of Pascual Contursi, tango poet. In love with a singer, he leaves his wife and son to go with her. Some time later, the singer leaves him and he composes the tango that gives the film its title.
Leandro and Carancha inhabit the islands located in the Parana delta. When their son brings home a girlfriend, her presence makes Carancha jealous and dramatic consequences ensue.
Ceferino is the train station chief o a remote town. A group of planters ask him to legit them the wagons to send the harvest to Buenos Aires, he agrees, but he gets fired.
Story about a humble musician who triumphs overcoming his failures and a young woman arrives in Buenos Aires from the interior of the country in search of triumph but finds death.