Luci, Graci and Mar­, three sisters that make a comedy trio, go to the wedding of their father with a woman who is 45 years younger than him. During the feast Luci's husband dies in an accident. Despite the tragedy, the trio have to fulfill their commitment acting during August in Benidorm. The widow discovers thanks to a notebook that her husband cheated on her, so she decides to flirt with everyone.

When the pieces of a singular figure are unearthed and then joined together, a devil of the lowest category breaks into a small Mediterranean village. From that moment on, the demon will enter the life of a painter named Bernardino, in the affairs of a "modern" marriage, in the existence of a frightened gardener and, finally, in the day-to-day life of the Great Momo.