The struggles of a Spanish family as it emigrates from the country to Madrid circa 1950.
A former singer lives alone with her fortune - and with her nephew, Fernando, a low character to whom she refuses to lend more money. Elisa leaves prison and starts a new life as a personal attendant to the aging singer, using her knowledge as a former nurse - a profession she can not return to. Fernando meets Elisa, and together they plan to poison the lonely woman, and use her money abroad. They plan their alibis well. But those who kill by the sword will perish by the sword.
A rich and famous painter dies leaving a secret that kept him apart from the woman he loved. Suspecting a family plot, she will try to unveil it keeping his death from the greedy relatives who are called in the middle of the night. She will try to find the truth before the dawn comes at last.