Le début du film montre une attaque de fourgon de transports de fonds qui tourne mal. Puis l'on suit Jean-Christophe, dit JC, un gardien de prison. Il vit avec la seule compagnie de son poisson rouge et mène une existence ordonnée et terne. Unique fantaisie dans sa vie quotidienne, il apprend le tango.
The film tells the story of Julio Arguelles, the son of a wealthy Buenos Aires businessman, who wants to marry Margarita, who is considered to be below his social status. Despite the father’s opposition they marry and elope together. The film then traces the life of the couple and, following the death of the young Margarita, concludes with Julio’s rise to fame as a tango singer. Astor Piazzolla, who in later life would revolutionized traditional tango, played a cameo role as a young paper boy.
A rich countryman sends his son to the city to study. He becomes involved in a romantic relationship with a girl who wants to succeed in singing. The couple go through great sacrifice and renunciation.