Rafael is a salesman at a large department store, dreaming for a management position. But the position goes to Don Antonio. They get in a fight in which Rafael accidentally kills Don Antonio. The only way not to get into prison is to get a testimony of Lourdes, who is in love with Rafael. She agrees to help only if he marries her and obeys her without questions. Rafael is forced to accept her offer, and immediately starts to make a perfect plan to murder his newfound wife.