A poor girl (Iran Castillo = Mónica) must to care her mother who is invalid after a car crash. The mother (Ofelia Medina = Beatriz) is a former movie actress now in a stormy, neurotic state due to the frustration of living in a wheelchair. Mónica wants to kill her mother because she does not, at least, shows some gratitude for her sacrifices. In a surprise party for the return to home of Beatriz after a non serious fall, Mónica gets mad and explodes due to the loudy and impertinent friends of her mother, mainly Beba (Cristina Michaus), who is besides a frequent visiting neighbor, and a pain in the ass.