On a busy night, a young woman named Chen Meng (played by Jiao Ting) fell to her death in a certain community. The cause of her death was unknown, and the scene of the crime was full of doubts. Soon, invitations with different contents but the same ominous atmosphere gathered six people of different identities, including company boss Li Jingwen (played by Zhang Daming) and his wife Hu Jing (played by Hao Wenting), real estate company sales consultant Lin Xi (played by Hu Sang), and game player Xie Lei (played by Li Yueming), to a club in the suburbs. Through brief exchanges, these people soon discovered that the only thing they had in common was that they all knew Chen Meng, who had died not long ago. Xie Lei was Chen Meng's abandoned boyfriend, Li Jingwen was Chen Meng's affair partner, and Lin Xi was Chen Meng's girlfriend. It seems that a mysterious person brought them together to try to find out the truth about the girl's death... This film is said to be adapted from the Japanese thriller mystery novel "Hot Spring Hotel".