In the vibrant atmosphere of a Budapest dance hall, dancers elegantly sway to the music, but the scene soon turns somber as Joe Flood (Dave Bautista), a deadly figure cloaked in shadows, executes his grim assignment with cold precision. He swiftly dispatches several guards before confronting his target on a balcony high above the stage. Despite the condemned man's desperate plea for a final moment to savor the performance, Joe's mercy is as fleeting as the echo of a gunshot that silences him forever. He then orders a terrified female attendant to escape the chaos.
As the remaining guards charge in, gunfire pierces the air, transforming the lively venue into a scene of panic and desperation. Amid the turmoil, Joe spots Maize (Sofia Boutella), a dancer who has fallen to the ground, and he quickly ensures her safety before vanishing into the shadows, gripped by a searing headache.
In search of answers, Joe confides in his loyal handler, Zvi (Ben Kingsley), confronting the heavy burden of his violent lifestyle. Drawn back to Maize's dance studio, he's struck by a profound connection and the burgeoning affection she holds for him, as she offers her number to continue their budding relationship. However, Joe feels the weight of his true self hanging over him, prompting them both to share their dreams during a heartfelt dinner where Maize reveals her ambition to open a dance school. As Joe fabricates a persona as a "retirement planner," he finds himself unexpectedly falling in love with her, igniting feelings he thought long since extinguished.
Tragedy strikes when Joe receives alarming news regarding his health from Dr. Kagan (Raffaello Degruttola), revealing a diagnosis of Creutzfeldt-Jakob disease, which will inevitably deteriorate his being within just three months. Consumed by the urgency to secure Maize's future after his death, Joe approaches Zvi with a dark request for a fatal arrangement. However, Zvi, devoted to Joe, declines the morbid proposal. Feeling despair creep in, Joe turns to Antoinette (Pom Klementieff), a fierce assassin with a vendetta against him from their shared past. Asking for a $2 million hit on his life, effective at midnight, Joe sets a tragic chain of events into motion.
Antoinette attempts to enlist the help of seasoned hitman Lovedahl (Terry Crews), but he dismisses the offer as insufficient. Undaunted, she recruits Goyang (Lee Hoon) and his crew, as well as a pair of Hungarian brothers notorious for their lethal synchronization. Struggling to prepare Maize for the heartbreak ahead, Joe pretends to break things off, crafting a lie to sour her feelings toward him. However, despair soon overtakes him, leading Joe to leave Maize a heartfelt voicemail confessing his love and the fictitious nature of his terminal illness.
Just as Joe grapples with the depths of his fabricated tragedy, Dr. Kagan delivers earth-shattering news: it was merely a mix-up; Joe is, in fact, perfectly healthy. The shocking reality sets in — he has unintentionally set off a catastrophic chain reaction. Goyang and his team invade Joe’s apartment, leading to a brutal showdown in which he dispatches each assassin with relentless skill. In an ultimate act of survival, he sets off a booby trap, vanquishing the last of Goyang's crew.
As word of the hit on Joe spreads, Antoinette actively fuels the hunt, increasing the bounty, leading Lovedahl back into the fray and forming uneasy alliances with less skilled assassins like Money (George Somner), and the Mackenzie brothers (Scott Adkins, Drew Galloway). Meanwhile, the infamous Party Girls (Lucy Cork, Shaina West) and Botas (Marko Zaror), a dancing assassin, prepare to eliminate Joe.
With no other options, Joe turns to Zvi for support, who helps alleviate his physical afflictions. Together, they devise traps at a castle, hoping to outsmart their pursuers. Lovedahl and Money attempt to abduct Maize but are thwarted by her agility. Meanwhile, the Mackenzie brothers fall prey to Joe's clever traps with deadly effectiveness.
As the murderous chaos ensues, Maize manages to escape from her captors and reunite with Joe. However, their moment of relief is short-lived as Antoinette’s hit squad, under the command of Max (Daniel Bernhardt), pursues them relentlessly. Joe, now revealing the truth of his past and diagnosis, implores Maize to accept this new reality; however, she responds with the shocking revelation of her pregnancy, prompting both disillusionment and physical pain as she realizes she has been struck.
Seeking sanctuary in a church, the compassionate priest offers them refuge when Joe proposes to Maize. The ceremony is soon interrupted by Max's ruthless crew, but with Lovedahl's timely intervention, a fierce battle breaks out, culminating in Maize accidentally killing Max while defending herself. With shocking speed, Joe whisks Maize away from the chaos, leaving behind a chaotic scene.
Confronted by Zvi, Antoinette's fate unfolds as her violations of the assassins' code lead to her demise at Zvi's hands. The day of Joe and Maize's wedding arrives, and amidst celebration, they pledge to leave behind their dark pasts, but Maize cleverly suggests that perhaps Joe should keep his skills sharp, for they may need them in the future for financial security. Their journey has etched profound scars into their lives, but forging ahead together, they embrace a future full of uncertainties and newfound hope.
