Boyka: Undisputed IV

Months after the previous film, Boyka continues fighting in Kyiv's underground arenas under manager Kiril. His latest bout ends in tragedy when he unintentionally kills Viktor De Falco, a moment that haunts him and makes him question what he is fighting for.

Learning that Viktor left behind Alma, Boyka resolves to help her and asks Kiril to arrange a fake passport. He heads to Russia to confront the debt shadowing Alma, risking everything to free her from danger.

In the Russian town of Drovny, Boyka learns that Alma owes money to the feared crime boss Zourab. Alma lives in a community center and works as a waitress in Zourab's underground fighting club, where loyalty is earned through strength.

Zourab seeks a top martial artist to recruit, and Boyka proposes a dangerous bargain: he will fight in three matches in exchange for Alma's freedom. Alma invites him to the training room to begin preparing for the grueling challenge.

In the first bout, Boyka defeats his unnamed opponent with deliberate, precise technique and unwavering resolve. The victory demonstrates his refined skill and focus, setting the tone for what follows.

In the second bout, Boyka faces two brothers and knocks them out with a hard-witted, relentless combination. The fight showcases his discipline and overwhelming power, building the sense that no challenger can match him.

During training, Alma explains that she cannot escape Drovny because her children need stability and the community center is the only home they've known. Her words deepen Boyka's resolve to secure her freedom and protect her family.

For the third bout, Boyka confronts Igor Kazmir, Zourab's elite enforcer. The fight is brutal and grueling, but Boyka prevails, proving he can overcome even a fiercely trained opponent.

Enraged by the escalating challenge, Zourab bribes a high-ranking police officer to bring in a secret, stronger fighter: Koshmar. The looming presence unsettles the arena and tests Boyka's limits.

Koshmar's arrival introduces a massive, furious competitor who pushes Boyka to his breaking point. The fight is a brutal test of endurance and strategy as Boyka fights to survive.

After the brutal exchange with Koshmar, Zourab retaliates by taking Alma hostage and ordering his henchmen to kill Boyka. The danger forces Boyka to push through pain to protect Alma.

In a brutal showdown, Boyka fights through the onslaught and ultimately chokes Zourab to death to save Alma. He fights wounded, ending the boss's reign and securing Alma's safety timewise.

Arrested and taken away, Boyka wrestles with guilt and the price of redemption. He continues to train and seek a higher form of mastery even while imprisoned.

Six months later, Alma visits Boyka in prison and forgives him for Viktor's death. He remains determined, fighting within the walls as he pursues the ideal of becoming the world’s most complete martial artist.

The narrative concludes by emphasizing that strength without purpose can lead to tragedy, but a fighter with resolve can choose forgiveness, responsibility, and a more honorable form of mastery.