Ace rules London's violent criminal syndicate with an iron fist, trusting nobody in a city teeming with betrayal. His reign nearly meets a bloody conclusion when a sudden street attack coordinated by his bitter underworld rival traps his motorcade in crossfire. Out of nowhere, a quiet young man named Max throws himself into the fray, disarming an assassin and sustaining serious wounds to keep Ace alive.
Fascinated by this reckless loyalty, Ace appoints Max as his private security shield, granting him unrestricted access to his inner sanctum. Yet the closer they become behind penthouse doors, the more dangerous their magnetic bond grows amid looming cartel warfare. Ace must figure out whether Max's fierce protection is genuine devotion or a devastating setup engineered by his enemies.
