Have you ever wondered how you would fight a criminal you can’t even see? In the new 2025 Korean drama “No Mercy” (단죄), one woman takes on a faceless enemy hiding behind modern technology. If you are ready for a thrilling story about high-tech justice, keep reading to find out more.
“No Mercy” (단죄) – Korean Drama 2025
One of the exhilarating crime thrillers of 2025, “No Mercy” (단죄), dives into the dark world of voice phishing and deepfake scams. It offers a fresh, modern take on the revenge genre. Directed by Choi Hyeong-joon and written by Kim Dan-bi, this Wavve original will grab your attention with its fast-paced, 8-episode story.
The show stars the talented Lee Joo-young, known for her roles in the 2020 hit K-drama “Itaewon Class” and the K-film “Broker.” Koo Jun-hoe, a member of the K-pop group iKON, also plays a major role as a determined detective. Additionally, the cast also features Ji Seung-hyun, who is famous for playing Jang Na Ra’s troublesome husband in the hit drama “Good Partner.”
A Modern Revenge Story
The story centers on Ha So-min. She once trained to be a police officer but left to pursue an acting career. Her life takes a tragic turn when her parents fall victim to a huge voice phishing scam. The criminals, a group known as “Ilseong,” use advanced deepfake technology to create fake voices and images that are impossible to detect.
After losing everything, Ha So-min does not give up. Instead, she uses her pain to fuel a mission for justice. She combines her acting skills with deepfake technology to go undercover and take down the entire criminal network from the inside. She works with Detective Park Jeong-hun, and together they uncover the dark truths behind the organization.
In this series, you will watch her transform from an unknown actress into a true heroine.
Meet the Cast and Main Characters of “No Mercy”
Lee Joo-young plays Ha So-min, our brave main character. She is a determined woman who uses her unique skills to get revenge for her family.
Koo Jun-hoe (IKON’s Junhoe) takes the role of Park Jeong-hun, a smart and dedicated detective. He becomes Ha So-min’s trusted partner in the fight against the criminal group.
Ji Seung-hyun as Ma Seok-gu, the cold and brilliant leader of the “Ilseong” syndicate. He is the main target of Ha So-min’s mission.
Why Should You Watch “No Mercy”?
“No Mercy” isn’t your typical crime drama. To begin with, it has a fresh and modern plot that tackles new-age digital crimes. This angle makes the story feel incredibly real and important for today’s world.
Moreover, you will easily connect with Ha So-min. She isn’t a superhero; she is an ordinary person who finds extraordinary strength when pushed to her limits, which makes her a strong and relatable heroine.
With only eight episodes, the story is tight and full of suspense. The fast-paced action series comes without filler scenes. Therefore, get ready for non-stop action that will keep you on the edge of your seat.
In addition, the fantastic cast brings compelling characters to life. The combination of Lee Joo-young’s emotional acting, Koo Jun-hoe’s charisma, and Ji Seung-hyun’s intense performance as a villain makes for perfect on-screen chemistry.
Finally, the production team described “No Mercy” as more than just a typical crime drama. They explained that it tells the story of a woman who, having lost everything, rises as a dark hero for society. Compared to earlier dramas addressing voice phishing, this series promises a much deeper and more intense exploration of the subject.
When and Where to Watch
“No Mercy” released its first episode on September 24, 2025. In South Korea, you can watch it on Wavve and Dramax. For international fans, the series will be available for streaming on KOCOWA+ and Vidio with subtitles. New episodes are released on Wednesdays and Thursdays.
Fun Facts
“No Mercy” is one of the first K-dramas to make deepfake technology a central part of its plot. It highlights a real-world danger while creating a unique and exciting story.
Final Thoughts
“No Mercy” looks like it will be more than just a TV show; it’s a story of courage in today’s digital world.
So, are you ready to join Ha So-min on her mission for justice? Please share your thoughts about this show below.
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