Juan is a beleaguered salaryman stuck in an unhappy marriage with Luciana, a weary massage therapist. The two were madly in love in their youth, but living under the same roof for five years has become difficult. As young parents, they are struggling to raise their two young children while keeping their jobs. The two are also penny-pinching to pay off their mortgage and financially supporting both of their parents. Juan is sick of tiptoeing around Luciana, who is now an angry, short-tempered nagger feeling miserable about what her life has become. Then one day, Juan meets his first love, Julieta, who confesses that she liked him back in college. Later, Juan helps a man on the metro who gives him two coins--which miraculously takes him back in time. When Juan wakes up in the present, he finds himself in a completely different reality: He is married to Julieta, not Luciana. But his moment of bliss is short-lived when he sees his new colleague at work: Luciana—now a beautiful, happy and successful career woman. Juan starts to see a new side of Luciana which he has never realized before and falls in love with her again, wishing he can undo what he changed in the past.