University student Trang's friend suddenly goes missing after she was last seen playing a ritual game in an elevator. She and her cousin investigate the place where the girl vanished, and get obsessively invested with what might be a door … Yu Duong, Thi Kieu Trinh Nguyen, Mai Bích Trâm, Xuân Hiệp, Neko Bao Tien Added on Amazon Prime 2023-02-22.