Knock, Knock! Open the Door!

Plot Synopsis

At twelve midnight, Chen Jiuyou received the news of his mother's visit, but at the same time learned that she had passed away in a car accident. When the eerie knocking on the door sounded, he was plunged into panic. Who on earth was it outside the door? Was it the ghost of his mother, or someone with ulterior motives? As things developed, more mysteries emerged: the surveillance video was garbled, his mother's shoes mysteriously appeared, and his sister warned him not to open the door. Chen Jiuyou and his friends didn't yet know that they were being drawn into a supernatural event...