The Devil You Know
악의 도시
Synopsis
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.
Top Cast
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Key Information & Fast Facts
- Director
- Hyun Woo-sung
- Screenplay & Story
- Hyun Woo-sung
- Original Title
- 악의 도시
- Country of Origin
- South Korea
- Spoken Languages
- Korean
- Runtime
- 1h 44m
Creative Leadership & Key Crew
Hyun Woo-sung
Hyun Woo-sung
Department Leadership Roster
Hyun Woo-sung
Director
Hyun Woo-sung
Writer
Production Stills & Gallery
Official cinematic photography and background stills for The Devil You Know.
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Frequently Asked Questions About The Devil You Know
Quick factual answers about cast, synopsis, director, box office, and release information.
What is The Devil You Know 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 directed The Devil You Know?
The Devil You Know was directed by Hyun Woo-sung.
Who stars in The Devil You Know?
The principal cast of The Devil You Know includes Han Chae-young, Hyun Woo-sung, Jang Eui-soo, Kim Hye-eun, Kim Won-woo.
When was The Devil You Know released and how long is it?
The Devil You Know was released in 2025 with a total runtime of 1h 44m.