Silvia, a beautiful 45-year-old widow, is obsessed with having a child and finds in attractive but naive Mercedes the perfect candidate to bear it. Silvia kindly offers her a job and a room in her house, and then manipulates her into seducing a young man named Jaime. They soon fall in love and Mercedes becomes pregnant. Silvia will do anything in her power to keep the baby, even if it means leaving a couple of bodies behind.