Based on a true story, federal agent Robert "Bob" Mazur (Bryan Cranston) goes deep undercover to infiltrate Pablo Escobar's drug trafficking scene plaguing the nation in 1986 by posing as slick, money-laundering businessman Bob Musella. Teamed with impulsive and streetwise fellow agent Emir Abreu (John Leguizamo) and rookie undercover agent posing as his fiancée Kathy Ertz (Diane Kruger), Mazur befriends Escobar's top lieutenant Roberto Alcaino (Benjamin Bratt). To catch the criminals Mazur will have to become one, risking it all to build a case that leads to indictments of more than 100 drug lords and the corrupt bankers who cleaned their dirty money.