Room No.7 (2017)

In a DVD-themed sex hotel, a young employee has hidden drugs in room #7 for criminals in exchange for wiping off his debt. But then his boss hides a dead body in the same room and locks the door. And a dangerous battle of wits ensues between a man who must lock away the secret behind the door, and another, who must go inside. Original title: 7호실 (2017)