Art Keller’s obsession to defeat the world’s most powerful, wealthy and lethal kingpin --- the godfather of the Sinaloa Cartel, Adán Barrera --- has left him bloody and scarred, and cost him the people he loves. Now Keller is elevated to the highest ranks of the DEA, only to find that in destroying one monster he has created 30 more that are wreaking even more chaos and suffering in his beloved Mexico. But Barrera’s final legacy is the heroin epidemic scourging America. Throwing himself into the gap to stem the deadly flow, Keller finds himself surrounded by men who want to kill him and an incoming administration that’s in bed with the very drug traffickers Keller is trying to bring down.