Miguel Ángel García Mazziotti, a Río de la Plata's decadent showbiz gay figure, receives the visit of his daughter Virginia, of whom he has been distanced for years. "The Fat", as everybody calls him in Punta del Este, openly rejects her visit, but when realizes will become a grandfather he can't help getting thrilled and celebrate Virginia's happiness. As a result they share a real familiar weekend that, as many families, to be happy it has to be fake.

Based on the play of the same name, the film features Siamese twins Annie and Dani, who face physical separation in an act that is as surgical as it is existential. Willie, another brother who has to operate on them, confesses his desire to be a Siamese and asks to sew himself to one of them. The tensions and obsessions of the cast become entangled with the fantastic fiction; meanwhile, the main location threatens to collapse.