Mac Espinoza, a faded boxer and former contender for the world champion title, is now a door to door salesman supporting his daughter Sofia. But then someone challenges him to come back.

Penélope an eleven-year-old girl the daughter of a drug-trafficking mother and a violent stepfather is taken to live with Martin (Hugo Catálan), her biological father, after her mother is sentenced to eight years in prison, Martín who has never seen her before agrees to take custody, at first the relationship is difficult but in a short time Martín and Pénelope establish a bond, but when a gang of criminals kidnaps her father Pénelope launches in search of her father with the help of a 9 mm pistol and Nacho an Uber driver.