King’s Man 4: Bloodlines of Betrayal continues the saga of the secret intelligence agency with a darker and more personal storyline. The film opens with Conrad Oxford uncovering classified documents that reveal a hidden branch within the King’s Man organization, one that has been manipulating global events for decades. When a failed mission exposes fragments of this conspiracy, Conrad realizes that the betrayal comes not from enemies abroad, but from figures deeply rooted in the agency’s own history.
The situation becomes more complicated when an international crisis erupts involving a mysterious arms dealer known only as “The Serpent.” His operations show uncanny knowledge of King’s Man tactics, suggesting that he has access to their internal files. Conrad, trying to protect the agency’s integrity, teams up with Polly Wilkins and a new recruit, Marcus Wynn, whose combat abilities and sharp intellect prove invaluable. Yet Marcus’s background triggers suspicion, especially when evidence hints that he may have ties to The Serpent’s network.
As the team investigates further, they travel across Vienna, Marrakesh, and St. Petersburg, uncovering hidden safehouses and encrypted communications left behind by rogue members of the agency. The deeper they dig, the more they discover that the betrayal stretches back generations. Conrad learns that his own ancestors may have played a role in creating the covert splinter group, forcing him to confront the moral legacy of his family. This revelation shakes his loyalty and blurs the line between duty and truth.
When The Serpent escalates his operations by stealing a prototype energy weapon capable of destabilizing entire regions, the King’s Man leadership grows divided. Some believe a full-scale assault is necessary, while others insist on negotiating with the rogue faction. Conrad, torn between following orders and exposing corruption, is pushed into a position where he must act independently. His team’s unity is tested further when Marcus disappears during a mission, leaving behind clues that suggest he may be working undercover—or betraying them entirely.
The climax takes place in an abandoned fortress high in the Carpathian Mountains, where Conrad confronts both The Serpent and the rogue King’s Man founders. In a dramatic confrontation, he learns that The Serpent is actually a former King’s Man agent driven by revenge after being sacrificed to protect the organization’s secrets. A brutal battle unfolds, forcing Conrad to choose between saving the agency or dismantling the corrupt lineage that created it.
In the end, Conrad exposes the truth to the world, reshaping the future of the King’s Man. Though the agency survives, it must rebuild from the ashes, free from the shadows of betrayal. Conrad walks away knowing that loyalty is earned—not inherited—and that the greatest battles are often fought within one’s own legacy.
