Mexican Federal Agent Marcos Camarena dedicated his life to the job. But in a country where white knights die meaningless deaths, martyred in a hole with fifty other headless bodies in the desert, corruption is not an attribute but a scale; no longer a stigma but the status quo. When Marcos's life is threatened, he leaves law enforcement and his life in Mexico City behind for a coastal resort town-until an old friend asks him to look after an outspoken politician, a woman who knows cartel violence all too well. Despite his best efforts, Marcos can't find it in his heart to refuse, and soon finds himself isolated on the political front lines of the war on drugs.