On a summer night in northern Mexico, four teens-Pato, Arbo, Marcos, and Gladys-have just snuck away from a quinceaera celebration when a gang of narcos attacks. After listening to their families being murdered, they narrowly escape, but are left with an awful truth. Theyve lost more than their loved ones-theyve lost everything. And La Frontera, the gang responsible for the massacre, has put out a reward for their capture or death. They cannot stay in Mexico.