Have you heard about the new revenge thriller that’s taking the K-Drama world by storm? Starring Lee Joo Young and iKON’s Koo Jun Hoe, “No Mercy” is one of the boldest and most interesting series of 2025. What sets it apart isn’t just its dark tone or gripping storyline—it’s how the drama uses deepfake technology as the center of its revenge plot, tackling an issue that feels frighteningly relevant in today’s digital world.
“No Mercy“
Casts: Lee Joo Young, Koo Jun Hoe, Ji Seung Hyun
Synopsis: One phone call was enough to shatter one’s entire world. For unknown actress So Min, everything collapses when a voice phishing scam tears her family apart.
With nothing left but the will to take revenge, she turns to deepfake technology as her ultimate weapon, infiltrating a vast and merciless syndicate. Along the way, she encounters Ma Seok Gu, a ruthless boss hungry for power, Jeong Hun, a cop torn between truth and loyalty, and Do Jin, a hacker with a sinister smile. Plunging into a web of betrayal and danger with the fake identities she forges, will she exact vengeance, or will they destroy her?
Genre: Revenge, Action, Crime
A Dark Story Rooted in Deepfake Technology
We’ve seen deepfake technology appear in other thrillers before, usually as a tool for deception or blackmail—but “No Mercy” takes it to a whole new level. It doesn’t just show the surface of how deepfakes can harm; it exposes how terrifyingly personal it can get when used to destroy lives.
The story follows Han So Min (Lee Joo Young), a former police university student and aspiring theater actress who dreams of supporting her family through her passion for acting. Her life takes a horrifying turn when her mother gets into an “accident” caused by a ruthless crime syndicate boss. But it doesn’t end there—the syndicate captures her mother and uses her voice through deepfake technology in a massive voice phishing scam. When So Min’s father discovers that he’s been scammed using his late wife’s voice, he takes his own life.
Left with nothing but grief and rage, So Min vows to take her revenge using the same weapon that destroyed her family—deepfake technology.
A Revenge Plan That Turns Technology Against Evil
So Min’s transformation from a heartbroken daughter to a calculated avenger is both painful and empowering to watch. With no family and a mountain of debt, she decides to fight back the only way she can—by infiltrating the very organization that ruined her life.
Helping her is Jeong Hun (iKON’s Koo Jun Hoe), a righteous cop and her former police academy classmate. Despite being the son of a high-ranking police official, Jeong Ho chooses his own path, determined to serve justice on his own terms. Together with a tech-savvy ally, they build a plan that uses deepfake technology as their weapon to expose and dismantle the syndicate from within.
As So Min gains the trust of the crime boss and Jeong Hun works undercover, their revenge plan unfolds with tension, deception, and shocking twists that make every episode impossible to pause.
Heart-Pounding Twists and Unrelenting Thrill
If you love intense thrillers with emotional depth, “No Mercy” will grip you from the start. Each episode is packed with high-stakes drama, clever mind games, and raw emotion. You’ll feel So Min’s pain as she watches her family fall apart—and her strength as she slowly takes back control.
What makes “No Mercy” even more addictive is its unpredictability. Just when you think you’ve figured out So Min and Jeong Ho’s plan, the show throws in another twist that leaves you questioning everything. Is it part of their strategy—or have they been outsmarted? That constant uncertainty keeps us on the edge of our seats from start to finish.
A Powerful Duo Without Romance
Unlike most K-Dramas that rely on romantic subplots, “No Mercy” dares to do something different. There’s no romance between So Min and Jeong Hun—but their chemistry is undeniable. Their bond is built on shared trauma, mutual respect, and the burning desire for justice.
The emotional tension between them feels deeper than romance. Their quiet understanding and unwavering loyalty bring a different kind of intensity to the story—one that focuses on trust and revenge rather than love. It’s refreshing, raw, and incredibly powerful to watch.
Where To Watch?
“No Mercy” isn’t just another revenge story—it’s a bold, modern thriller that exposes how technology can be used to manipulate, destroy, and, in the right hands, serve justice. Don’t worry about where to watch it because it’s available for streaming on KOCOWA+ with multiple subtitles!
