Victor (Colin Farrell) has successfully penetrated the treacherous underworld ruled by the merciless kingpin Alphonse Hoyt (Terrence Howard). His ironclad motive? To exact vengeance for the brutal murder of his wife two years prior, a crime orchestrated by Alphonse to evade prosecution after his men inadvertently took the life of Victor’s young daughter. Victor's plan is meticulously crafted: to psychologically torment Alphonse over an extended period before delivering the ultimate retribution—his death.
As Victor integrates himself into Alphonse's gang, tensions mount as hitmen are picked off one by one. With each assassination, Alphonse acquires fragments of a photograph that, when pieced together, will reveal the identity of the perpetrator. In a moment of paranoia, he discovers a note that chillingly states, “719, Now You Know,” escalating his anxiety and prompting him to eliminate anyone he suspects of being involved in the demise of his associates.
Amid this chaos, Victor finds himself under the watchful eye of Beatrice (Noomi Rapace), a mysterious young woman residing in the apartment across from his. Intrigued by Victor, Beatrice reaches out to him and invites him on a date where she unveils her hidden agenda: she possesses a video of Victor committing a murder and demands he kill the drunk driver who permanently scarred her in a horrific accident, threatening to go to the police if he refuses. Beatrice, once a beautician, now lives with her mother, Valentine (Isabelle Huppert), while Victor, posing as a construction worker, considers her proposition.
As the plot unfolds, Alphonse becomes increasingly besieged by perceived threats to his life—though unbeknownst to him, these arise from Victor’s covert manipulation. During an ambush involving Jamaican gang members, Victor saves Alphonse, thereby securing a precarious trust. Alphonse's dealings extend to his superior, Lon Gordon (Armand Assante), who is irked at Alphonse’s leadership. A message arrives demanding Alphonse's attention, adding high stakes to an already tense situation.
With each turn, Victor meticulously gathers intelligence and employs a strategy to paint Alphonse as responsible for the escalating violence. He has also taken the brother of Ilir Brozi, an Albanian kingpin, hostage to leverage his forces against Alphonse. Through cunning scheming, Victor communicates his motive to Beatrice and reveals his true identity—he is Lazlo Kerick, the man Alphonse believed he had killed along with his family.
At a pivotal moment, Victor orchestrates a fake sniper attack designed to further torment Alphonse. However, during this precarious operation, he almost gets caught, only to be rescued by Beatrice, deepening their bond. Victor's sinister plans culminate in a narrative twist, as he manipulates circumstances to frame Alphonse for a crime that will lure Ilir and his gang into a deadly confrontation.
Despite their growing romance, the stakes become perilous when Beatrice reveals her intention to protect Victor from the consequences of his actions. Tensions spike, as Darcy (Dominic Cooper), a friend of Victor's within Alphonse's crew, begins to unveil the truth behind Victor's motives. As battles rage on including a climactic standoff in Alphonse's home, allegiances shift and violent encounters ensue. Victor’s motivations are put on display in a heart-pounding climax where allegiances blur and survival becomes a game.
In the end, amidst the chaos, Victor and Beatrice find a semblance of peace as they escape together, sharing a tender kiss on a subway, a stark contrast to the bloodshed that surrounds them. In a world rife with betrayal and vengeance, they attempt to carve out a life—together.
