A small clerk Ah Chi (played by Wong You-nam) got on a red minibus from Mong Kok, Kowloon to Tai Po, New Territories in the early morning. There were 17 people on the bus, including the driver Fat Suet (played by Lam Suet), the loyal uncle Wong Man Fat (played by Simon Yam), the witch (played by Kara Hui), IT man Ah Xin (played by Xu Tianyou), the beautiful Yuki (played by Janice Man), the drug addict (played by Lee Cansen), etc. The originally peaceful night was suddenly broken after the minibus passed through the Lion Rock Tunnel. Everyone found that except for the passengers on the bus, all the residents of Hong Kong seemed to have disappeared. A series of mysterious events followed one after another. Everyone was terrified and decided to create a united front to save themselves and solve the mystery.