New Mexico Territory, 1880. Rio Cutler and his older sister Sara must abandon their home after an unfortunate event happens. In their desperate flee to Santa Fe, they cross paths with the infamous outlaw Billy the Kid and his gang, who are ruthlessly pursued by a posse led by Sheriff Pat Garret.

At the age of 19, Bea realizes that the love she deemed infinite is as decadent and full of excesses as a night in the port of Acapulco.