An American priest working in Mexico is possessed during an exorcism and ends up committing a terrible act. Eighteen years later, the consequences of his sin come back to haunt him, unleashing the greatest battle within.

GRINGO, a dark comedy mixed with white-knuckle action and dramatic intrigue, explores the battle of survival for businessman Harold Soyinka (David Oyelowo) when he finds himself crossing the line from law-abiding citizen to wanted criminal.