Espionage, crime and politics collide in modern day Mexico City. A brilliant but self-destructive CIA officer, his young and ambitious Mexican-American protegee, and the city's inspirational but secretive Mayor all struggle for power during an invasion of the city by the world's most murderous drug cartel.

Wayne, Isa and Romero work frantically to rescue the hostages. Lalo and his police force do the same, but Lalo has his own agenda. Bautista carries out a mysterious plan involving his sicarios. And Wayne and Isa eventually come a terrible realization about why Bautista invaded the city.

Wayne's off-the-books operations finally catch up to him as Isa's fiancé pursues a lead that could put both Wayne and Isa in jail. Isa has to create a fake asset to cover up for Wayne’s misbehavior. Meanwhile, Bautista threatens Wayne’s life, but mysteriously, and ominously, lets him live. Veronica starts to realize the truth about her marriage. And Lalo gets his hands dirtier than ever before.

In the aftermath of the previous episode, Wayne, Isa, Veronica and Lalo all come to realizations about their lives and relationships. By the season’s end, the previous alliances have been destroyed and new ones are being built. And our main characters have to prepare for war, with new battle lines drawn.