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Movie Info & Details
Release Year2025
Runtime1h 44m
LanguageKorean
CertificationNR
GenresThriller, Crime
Votes2
DirectorHyun Woo-sung
WritersHyun Woo-sung
TypeFeature Film
Rating5.5 out of 10
Cast3 credited
Also Known AsThe Devil You Know
About The Devil You Know
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.
Directed by Hyun Woo-sung, The Devil You Know leans on a strong ensemble — Han Chae-young, Hyun Woo-sung, Jang Eui-soo — to carry a story that balances spectacle with character.
The film landed with audiences for its craft and performances, and remains one of the most talked-about thriller titles of 2025.
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