Door Lock

“In my house a stranger is waiting.”

Someone has been inside Jo Kyeong-min's (Gong Hyo-jin) one-room apartment, and nothing in it has been taken. She lives alone, and the signs of a stranger are small enough that no one else will take them seriously. Lee Kwon adapts the Spanish film Sleep Tight from the victim's side of the door, and her fear of the dark hours, and of what the lock can no longer keep out, grows with every night she spends there.