The Last Tango takes place hours before Violeta's performance with Carlos Gardel; replaced by her friend Lucecita, she locks up her ex-partner Julio to disguise herself as him and be able to dance with Lucecita in front of the singer.

Ema and Juan, a young couple expecting their first child, face the emotional toll of pregnancy. As a damp stain grows on the wall, a symbol of their distress, Ema tries to put into words the emotions she's experiencing. Juan, caught up in his own desire to start a family, struggles to fully hear her.