- HD 1080
- Runtime: 102m.
- Status: Released
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- Languages: ko
- Country: South Korea
- Director: Lee Kwon
- Stars: Gong Hyo-jin, Kim Ye-won, Kim Sung-oh, Jo Bok-rae, Lee Ga-sub
- Production_studio: Plus M Entertainment, Studio Pieona
- Slogan: In my house a stranger is waiting.
- The Door Lock is featured in the top rankings of 2018
- #17 in Top Crime Movies of 2018
- #36 in Top Thriller Movies of 2018
- #9 in Top Mystery Movies of 2018
Kyung-min lives alone in a one-room apartment. One day, she finds traces of a stranger breaking into her room and soon a mysterious murder case begins to unravel.