Valentine Pescatore is a rookie Border Patrol agent, just trying to survive the Line. Until he pursues a suspect across the border into Mexico, and finds himself in serious trouble. Isabel Puente is a beautiful US agent investigating a powerful Mexican crime family. She offers Valentine a chance if he works with her as an undercover agent she ll make his problems go away. But soon their relationship is no longer strictly professional. Over the border in Tijuana, anti-corruption chief Leo Mendez is working to bring criminals to justice. In a city where anyone can be bought, he s made enemies on both sides of the law. All three have the same aim: to bring down the cartels. But in a world built on lies, how do you know who to trust? As the violence escalates, the stage is set for a showdown full of bloodshed and betrayal.