The Devil You Know (2025): cast, story & where to watch
2025 · Film · ★ 5.5
Released in 2025, The Devil You Know is a thriller and crime film directed by Hyun Woo-sung, running about 104 minutes.
What it’s about. Yu-jeong is a star English tutor, popular nationwide for her lessons and beauty. She has the perfect life going on- her education business is blooming, she has a successful doctor husband and a loving daughter. One day, she meets Sun-hee from a volunteer group. He seems like a friendly guy with charms. Gang-su, Yu-Jeong's childhood friend who is like a little brother to her, however warns her about Sun-hee that he has a bad reputation even among gangsters. But what Yu-jeong doesn't realize is that Sun-hee is a narcissistic sociopath- until it's too late. Meanwhile, Sun-hee's gang brothers steal money behind his back, and Sun-hee's old time friend approaches him to start a new drug business. Yu-jeong fights tooth and nails to break free from Sun-hee and enlists Gang-su's help- and everything turns deadly when it all reaches a boiling point.
Who’s in it. The Devil You Know stars Han Chae-young as Yu-jeong, Hyun Woo-sung as Sun-hee and Jang Eui-soo as Gang-su.
How it landed. With an audience score of 5.5/10, The Devil You Know has drawn a solid, mixed-to-positive response.
Where to watch. Streaming options change often. See the full, country-by-country breakdown on our where to watch The Devil You Know page.
If you liked it. Fans of The Devil You Know tend to enjoy The Dark Knight, Pulp Fiction, Parasite and Fight Club.
Frequently asked
- Where can I watch The Devil You Know (2025)?
- Streaming, rental and purchase options for The Devil You Know change frequently. Check our where-to-watch page for the latest availability in your country.
- Is The Devil You Know worth watching?
- The Devil You Know holds an audience score of 5.5 out of 10, and is a strong pick if you enjoy thriller and crime. Reactions are mixed, so it may depend on taste.
- Who stars in The Devil You Know?
- The Devil You Know stars Han Chae-young, Hyun Woo-sung and Jang Eui-soo.
- When was The Devil You Know released?
- The Devil You Know was released in 2025, with a runtime of about 104 minutes.