An elegant young woman is seen traversing the rain with a suitcase, patiently waiting in a beautifully adorned gazebo located on a lotus swamp. As she sits there, she gazes fondly at a photograph of the man she longs for.
This man, known as Dum, is currently entangled in a dangerous confrontation with another gunman named Mahesuan. They face off against Yoi, a fierce enemy of their boss, Fai. In a dramatic display, Dum, clad entirely in black and donning a cowboy hat, boldly charges into the fray, outgunning eight of Yoi’s henchmen with remarkable precision. In a notable moment, Dum’s bullet ricochets around the room before settling into a man’s forehead. Suddenly, a red title card breaks the tension, stating: > "Did you catch that? If not, we'll play it again!" The scene is then replayed in slow motion, offering a whimsical, Rube Goldberg-style view of the bullet's chaotic journey.
After dispatching Yoi, Dum swiftly departs on his horse, racing towards the gazebo, only to discover that Rumpoey Rajasena has returned home. The next day, she finds herself bound by a formal engagement to the ambitious Police Captain Kumjorn, orchestrated by her father, the governor of Suphanburi province.
Mahesuan, filled with resentment over playing second fiddle to Dum, seeks out Dum, whom he discovers playing a harmonica. He ridicules Dum's sentimental nature and challenges him to a duel. In a gripping gunfight, Dum fires first; however, Mahesuan emerges unscathed. Just then, a decapitated snake falls from a tree, having been targeted by Dum in a moment of life-saving heroism.
Remembering their childhood a decade prior, during World War II, Dum recalls the time Rumpoey and her father sheltered at his family’s farm in rural Thailand. They had shared innocent adventures, filled with youthful playfulness as Rumpoey insisted they take a boat ride in the lotus swamp. Their visits to the picturesque gazebo—known as "Sala Awaiting the Maiden"—were etched with tales of love and loss, as Dum recounted the sorrowful story of a woodcutter who awaited a maiden that never came.
Their peaceful memories are disturbed when Dim faces hostility from some local boys who torment Rumpoey. After Dum intervenes, he suffers a punishment from his father, who admonishes him with a caning. In a tender moment, Rumpoey feels guilt for the trouble she's caused and gifts him a harmonica to replace the flute she broke.
Fast forward to the present, Captain Kumjorn details his ambitious plan to rid the lawless Suphanburi of Fai’s bandits. Leaving behind his rather detached fiancée, he takes a photograph of Rumpoey, vowing to protect it with his life.
At a historic Buddhist temple, Dum and Mahesuan forge a blood oath in the presence of a Buddha statue. Mahesuan pledges his loyalty to Dum, uttering the solemn vow, "If I break this oath, may his gun take my life."
When a traitor betrays Kumjorn's police forces to Fai, things take a drastic turn. Just as the police are ready to finalize their assault, Dum and Mahesuan appear on a cliff, unleashing their firepower with devastating effect.
In a shocking turn of events, Fai captures Kumjorn, coercing Dum into taking the young man’s life. As Kumjorn pleads for Dum to inform Rumpoey of his fate, he unwittingly reveals his connection to her, handing Dum the photograph that stirs deep emotions.
In the chaos that follows, Mahesuan discovers the wounded Dum, and as he reflects on the past year, Dum recalls the rekindled bond he shared with Rumpoey while at university in Bangkok. Despite his protests, Rumpoey desires to be close to him, culminating in a mutual declaration of love and a promise to meet at the gazebo one year later.
Upon Dum’s return to Suphanburi, he is met with tragedy as he finds his family brutally murdered. Swearing vengeance, Dum confronts Kong, the man responsible, and begins his path as an outlaw under Fai’s influence.
As Rumpoey's wedding to Kumjorn approaches, she finds herself in despair, nearly attempting to take her own life—a plan thwarted by her caring nanny. Fai seizes the moment to launch an attack on the governor's mansion, igniting dread in Dum's heart as they navigate through a sea of police.
With escalating tensions, Mahesuan betrays Dum and seizes control of the situation. Dressed sharply in white, Dum confronts Rumpoey and Kumjorn at the wedding, warning of the imminent danger while also facing Kumjorn's violent ire as they clash over their feelings for Rumpoey.
As chaos unfurls with Fai's gang attacking, the scene culminates in heartbreak, with Mahesuan and Dum finding themselves in a deadly standoff. Their bullets fly, but only Dum's finds its mark, irrevocably changing the course of their lives. As Dum succumbs to injuries amidst the rain, Rumpoey's anguish resonates in the air, echoing Dum’s earlier words about life’s suffering and elusive dreams of hope.
