Based on a true story, U.S. Customs agent Robert Bob" Mazur (Bryan Cranston) goes deep undercover to infiltrate Pablo Escobar's blood-soaked drug trafficking scene plaguing the nation in 1985 by posing as slick, money-laundering businessman Bob Musella. Teamed with impulsive and streetwise fellow agent Emir Abreu (John Leguizamo) and rookie agent posing as his fiancé Kathy Ertz (Diane Kruger), Mazur befriends Escobar's top lieutenant Roberto Alcaino...