After a personal tragedy, a police detective investigates a school massacre committed by a student - and another massacre. Are the 3 tragedies linked to demon possession?

Arnulfo Rubio smuggles weapons for a deadly Mexican cartel. ATF agent Hank Harris attempts to apprehend him, but gets kidnapped by Rubio, instead. Rubio takes him to his bosses, but during the 600-mile-long drive, they slowly befrien