More and more K-Dramas are dropping this September — and we’re definitely not complaining! One of the most exciting titles to add to your watchlist is “No Mercy,” a brand-new crime action thriller that tells the gripping revenge story of an unknown actress who sets out to take down a massive voice phishing syndicate using high-tech methods. The drama stars Lee Joo Young and iKON’s Koo Jun Hoe, along with veteran actor Ji Seung Hyun, making this an unmissable lineup for fans of crime thrillers and revenge dramas!
“No Mercy“
Casts: Lee Joo Young, Koo Jun Hoe, Ji Seung Hyun
Synopsis: Tells the story of an unknown actress who, after losing her parents to a phishing scam, uses deepfake technology to infiltrate a massive voice phishing syndicate to bring them down.
Genre: Revenge, Action, Crime
Premiere Date: September 24, 2025
Meet The Characters
Lee Joo Young as Ha So Min
Lee Joo Young is set to take on the lead role of Ha So Min, a former police academy student turned struggling, unknown actress who survives purely on grit and determination. After losing both her parents to a phishing scam, shattering her dreams and everything she holds dear, she vows to hunt down the syndicate responsible for her parents’ deaths. Using deepfake technology, she infiltrates the criminal network from within, risking her life to expose their crimes and bring them to justice.
We all recognize Lee Joo Young from her previous works since she built a reputation as a rising actress known for her charisma and with memorable performances in popular dramas like “Weightlifting Fairy Kim Bok Joo” and “The Ghost Detective.”
IKON Ko Jun Hoe as Park Jeong Hun
Koo Jun Hoe will portray Park Jeong Hun, an elite detective and top graduate of the police academy. Driven by a deep sense of justice, Park Jeong Hun finds himself teaming up with Ha So Min to uncover the secrets of the sprawling criminal network. Together, they take on high-risk operations and dig deeper into the dark world of voice phishing crimes.
Known as an idol turned actor from the K-pop group IKON, Ko Jun Hoe is building a diverse filmography and recently starred in the romantic comedy “Marry You” as the second male lead where he took on the role of the charming second male lead.
Ji Seung Hyun as Ma Seok Gu
Ji Seung Hyun takes on the role of Ma Seok Gu, the ruthless and calculating head of the voice phishing organization Ilseongpa. As the mastermind behind the syndicate’s large-scale operations, Ma Seok Gu poses a serious threat to Ha So Min and Park Jeong Hun.
Ji Seung Hyun is already well respected in the industry, with standout performances in multiple hit dramas like “Korea-Khitan War” and “My Dearest.” His presence in “No Mercy” guarantees a compelling villain who can make us feel the chills.
Why You Should Watch “No Mercy“
First of all, “No Mercy” stands out because it’s a short but powerful 8-episode Wavve original drama. This means every episode is tightly packed with action, mystery, and emotional scenes, making it perfect for binge-watching. Unlike typical revenge stories, this series takes a technology-driven approach, highlighting deepfake tech and phishing crimes — something we rarely see in K-Dramas. According to the production team, “No Mercy” is more than a typical crime drama; it portrays a woman who has nothing left to lose, transforming into society’s dark hero to bring justice where the system failed.
Another reason to watch is its timely and socially relevant theme. Voice phishing and deepfake crimes are a growing issue worldwide, and South Korea has also seen a surge in cases. More and more people are falling victim to these scams as criminals become increasingly sophisticated with technology. “No Mercy” aims to shine a light on these crimes by depicting realistic scenarios, from credit card loan fraud to messenger scams and even abductions linked to phishing operations. This level of detail not only raises awareness but also gives the drama a thrilling, ripped-from-the-headlines feel.
And of course, the cast lineup is a major draw. With Lee Joo Young bringing emotional depth, Ji Seung Hyun delivering a chilling villain, and Koo Jun Hoe stepping into the role of a justice-driven detective, we get a trio of performers who are versatile and charismatic in their own right. Watching a rising actress, a trusted veteran actor, and an idol-turned-actor work together will add another layer of excitement to the show.
Where To Watch?
“No Mercy” offers the kind of revenge drama that will keep viewers hooked and waiting eagerly for the next episode so don’t forget that this drama will be available for streaming soon only on KOCOWA+ with multiple subtitles!
*all images credit to wavve
