What happens when you rediscover the love of your youth? In principle, you would live a love story, but this chapter of your life cannot be written because it is prevented by a religious order. This is the plot of 'Perdóname, Señor.' The convictions of nun Lucía Medina will be in danger when she returns to her hometown, Barbate, to up the ends left loose when she surrendered to religion. There she will encounter the love of her youth, Bruno: a Mafia boss in the process of redemption. The abandonment of Bruno will free his position, which could be occupied by a young man called Rafa, who is Lucia's nephew.