Sean Vetter and Demetrius Hicks are DEA agents who have spent seven years on the US/Mexico border fighting the drug war against the powerful Baja Cartel. Their efforts culminate in the arrest of Memo Lucero, the cartel's kingpin, which they believe will significantly disrupt the drug trafficking operations. However, with Lucero in custody, a new and more mysterious drug lord, known only as Diablo, emerges to claim control of the cartel. Diablo proves to be more ruthless and dangerous than his predecessor, escalating the violence along the border. As Diablo consolidates power, Vetter and Hicks find themselves up against an adversary who seems always one step ahead.

The situation takes a personal and tragic turn for Vetter when his wife, Stacy, is killed in what appears to be an assassination attempt meant for him. Devastated by her loss, Vetter becomes consumed with vengeance, stepping outside the bounds of the law in his quest to find her killer. His pursuit leads him down a dark path, blurring the lines between justice and revenge. As Vetter digs deeper into the cartel's operations, he discovers a complex web of betrayal and corruption that challenges his understanding of right and wrong. Hindered by his grief and rage, Vetter's mission becomes as much about seeking retribution for his wife's death as it is about dismantling the cartel.