The film follows an unnamed, highly successful, and professional cocaine dealer known only as XXX, who operates with the cold precision of a corporate executive rather than a street thug. Seeking a quiet retirement from the
criminal underworld, XXX plans to walk away with a clean million pounds and his life intact. However, his powerful underworld boss, Jimmy Price, refuses to let him go so easily and instead saddles him with two impossible, high-stakes final jobs. The first task is to track down Charlie, the rebellious and drug-addicted runaway daughter of powerful billionaire contractor Eddie Temple. The second, far more
dangerous assignment involves purchasing a massive shipment of one million ecstasy tablets from a volatile, neon-obsessed neo-Nazi gang leader named Duke, who stole the drugs from Serbian war criminals. As XXX delves deeper into these assignments, his meticulously managed world begins to unravel. He tracks Charlie down, only to discover she has been murdered, pulling him deeper into a web of deceit. Simultaneously, he negotiates the ecstasy deal with Duke, working alongside his loyal associate Morty and his eccentric right-hand man, Gene. However, XXX soon realizes that Jimmy Price is playing a double game, secretly working with Eddie Temple and plotting to destroy him. Driven by a desperate need for survival, XXX uses his formidable intellect to outmaneuver both law enforcement and his treacherous criminal associates. He uncovers the brutal truth behind the ecstasy shipment: the drugs actually belong to a vicious Serbian warlord named Lazza, who wants them back at any cost. Sensing an opportunity to secure his permanent freedom, XXX plays his enemies against one another. He orchestrates a brilliant scheme where Jimmy Price is murdered by Eddie Temple, and Duke’s gang is neutralized. XXX then negotiates directly with the Serbians, returning their drugs while keeping a massive profit for himself. Having successfully survived the chaos and outsmarted the entire criminal hierarchy, XXX finally achieves his goal of stepping away from the "layer cake" of the British underworld. But just as he believes he has successfully retired on the steps of a church, a bitter and vengeful rival, thwarted by XXX's rise, confronts him outside and shoots him in broad daylight. XXX collapses on the steps, realizing too late that in the world of high-level crime, there is no true escape, leaving his ultimate fate ambiguous as he bleeds out, having climbed to the very top of the criminal ladder only to be brought down in an instant.