Sympathy for Mr. Vengeance

Ryu, a stoic and deaf-mute man, leads a dull existence working in a factory. He is burdened by the weight of his frail sister's health condition, struggling to provide for her amidst the monotony of life.

Ryu's sister is in desperate need of a kidney transplant, pushing him into a whirlpool of urgency and anxiety. Confronted with this dire situation, Ryu begins to explore the dangerous realm of the black market for organ donations.

In a moment of desperation, Ryu contacts underground organ dealers, offering one of his own kidneys and money in exchange for a suitable match. Unfortunately, these shady characters disappear, leaving Ryu feeling exploited and hopeless.

Just as a legitimate donor becomes available, Ryu’s hopes are dashed by the overwhelming costs associated with the transplant procedure. This situation leaves him further distressed and searching for solutions.

In a moment of desperation, Ryu's radical girlfriend, Yeong-mi, proposes a shocking plan to kidnap the daughter of Ryu's former boss, Dong-jin. Their scheme taps into the dark potential of desperation as they plot to ransom the child.

Their plan takes a twisted turn when they cross paths with Dong-jin as he returns home. During this encounter, a former employee, Peng, attempts to take his own life, prompting Ryu and Yeong-mi to consider their actions more critically.

Ultimately deciding to kidnap Yu-sun, Dong-jin's young daughter, Ryu's and Yeong-mi's plan solidifies after realizing she would be safe in Ryu's sister's care. Their intended innocent interactions soon reveal underlying tensions.

As the bond develops, Ryu crafts a beautiful necklace for Yu-sun, symbolizing hope amidst their cracked reality. Meanwhile, his sister dedicates her time to Yu-sun, tenderly caring for her and providing encouragement.

The heart-wrenching tragedy strikes when Ryu's sister, weighed down by despair, takes her own life. Ryu, grappling with grief, takes Yu-sun to their childhood riverside, where he becomes lost in his sorrow, leading to Yu-sun's untimely slip into the river.

Upon discovering the truth about the kidnapping and the tragic losses, Dong-jin is consumed by guilt. He hires a detective to track down the kidnappers, unraveling a complex web of events spawned from his corporate decisions.

As the detective delves deeper into the case, he discovers Yu-sun's necklace, leading him to suspect Peng. The case takes a darker turn when news of Peng’s family tragedy complicates the investigation, putting more lives at stake.

Overwhelmed by the loss of his sister and Yu-sun, Ryu embarks on a vengeful rampage against organ traffickers. Armed with a baseball bat, he seeks justice, but suffers critical injuries during his bloody confrontations.

In a chilling twist, Dong-jin captures Yeong-mi, who is tortured before meeting her fate at his hands. With her last words, she warns him about the repercussions of her terrorist connections, foreshadowing his impending doom.

Ryu, having returned to Yeong-mi's apartment, unwittingly walks into Dong-jin's trap. An intense struggle ensues, leading to a brutal culmination beneath the river, only for Dong-jin to be confronted by unexpected retribution from Yeong-mi's allies.

The story culminates with Dong-jin's demise at the hands of the terrorists, leaving a horrifying message pinned to him. Ryu’s tragic fate and the spiral of violence exemplify the grim consequences that unfolded from desperate choices.