Former Close Protection Agent Joshua Duffy once excelled as a world-class bodyguard until a harrowing mission in Lebanon cost him his lower left leg and routed him to a bleak existence as a mall cop in New Jersey. Yearning for redemption and a return to the adrenaline-fueled life he lost, Duffy's prayers are unexpectedly answered. A chance meeting propels him into one last job—protecting a United Nations peace mission venturing into Mexico's lethal Sierra Madre mountains, notoriously known as Espinazo del Diablo—the Devil's Spine. Here, amidst tranquil villages shadowed by homicidal drug cartels, Duffy must navigate perilous terrain, where every step could be a battle for survival, and where achieving peace is as unlikely as coming out alive.