In the year AD 859, during the decline of the Tang dynasty, various rebel factions emerged, with the most prominent being the House of Flying Daggers in Fengtian. This group fervently opposes the corrupt government, engaging in acts of rebellion that endear them to the local populace by robbing from the wealthy to aid the less fortunate. However, the government sends two police officers, Leo and Jin, on a daunting mission: to assassinate the leader of the Flying Daggers within a brief span of ten days, a task rendered nearly impossible due to the leader’s concealed identity.
In a cunning strategy, Leo apprehends Mei, a blind dancer believed to be the daughter of the previous leader. To carry out their plan, Jin poses as a sympathetic rebel, successfully orchestrating Mei's escape from custody to win her confidence. Together, they embark on a journey toward the headquarters of the Flying Daggers, closely followed by Leo and his reinforcements. As they travel together, a tender romance blossoms between Jin and Mei, further complicating their mission.
To lend credibility to their ruse, Leo and his team orchestrate fake ambushes against Mei and Jin. However, their charade takes a dangerous turn when they are genuinely attacked by military forces. During a covert meeting, Leo reveals the unsettling news that the military is now involved and intent on eliminating both Jin and Mei.
Their perilous adventure continues when they become the targets of yet another attack in a bamboo forest, where, against all odds, the House of Flying Daggers comes to their rescue, escorting them to their stronghold. Shocking revelations unfold as it becomes clear that Mei has been pretending to be blind and is not who she claimed to be. In a twist, she is engaged to Leo, who is discovered to be a double agent working for the Flying Daggers. Rather than showing fear of the military, the rebels are eager for confrontation.
A devastated Leo confronts Mei, lamenting the three years he has spent undercover, questioning her ability to fall for Jin in such a brief period. Heartbroken, Leo's jealousy ignites a clash, but Nia, their superior, intervenes, assigning Leo new duties and forcibly separating the trio. Mei is commanded to execute Jin but, in a moment of defiance, chooses to set him free, albeit initially rejecting the idea of escaping with him.
Later, as Mei reevaluates her feelings, she races after Jin only to be intercepted by Leo. In a shocking confrontation, he throws two daggers towards her; Mei bravely deflects one but ultimately succumbs to the other. As the two men engage in a fierce struggle, a fierce blizzard begins, signaling the approaching military forces.
With both men suffering from grave injuries, Leo prepares to deliver the final blow to Jin using Nia’s dagger. However, Mei emerges once more, Leo's dagger embedded in her chest, ready to exact revenge on Leo. As Jin desperately urges Mei to focus on her own survival, the emotional tension escalates. In a twist of fate, Leo, pretending to throw his dagger, enacts a sacrifice that culminates in Mei taking the fatal hit intended for Jin.
In the poignant aftermath, Leo, burdened by guilt, stumbles away while Jin kneels by Mei’s side, mourning the profound loss of a unique love, singing a haunting elegy that celebrates her as a "rare beauty," forever out of reach. The fate of the House against the military remains shrouded in uncertainty.
