Paco, a Sevillian living in Paris who works as a music hall singer, receives news of the death of his uncle named him heir to his fortune. The only condition imposed is to pass a test that is to fight in one of the main squares in Spain. If the attempt fails, the estate would pass to her sister full. From here, Paco will have to wake up if he want to show their courage and take part in a bullfight.
A mature man habitually pursues young girls, for which he is abandoned by his wife. The devil intervenes, offering both spouses, separately, to regain their youth. The two agree to make up for the lost years, but the devil makes them both join the same gang for a summer. The husband, who now feels comfortable, falls in love with his wife again without recognizing her, just as she will not recognize her ex.
