In the 1980s, Robert Mazur, a U.S. Customs Service agent, assumes the alias "Bob Musella" to become a key figure in laundering money for drug lords. He then infiltrates the world's largest cartel and helps dismantle Pablo Escobar's money-laundering operation, as well as take down the Bank of Credit and Commerce International, which had secretly acquired shares in First American Bank in Washington, D.C.