The father of the protagonist Uncle Niu was a traitor during the Japanese rule. In order to save his own life, he killed the family of an anti-Japanese hero. After being wronged, the hero became a ghost and vowed to kill Uncle Niu's family to avenge his own family. Uncle Niu has the ability to see ghosts and has made friends with the ghosts. Under the protection of the ghosts, the ghost of the hero failed to harm Uncle Niu, so he turned to Uncle Niu's son Hui. In order to prevent Hui from being killed, Uncle Niu sent Hui to a foreign country for refuge. Since then, Uncle Niu has run a Shanshui Tea House in the New Territories. It is open during the day, but entertains the ghosts at night to thank them for protecting his family. When Hui was 26 years old, he returned to Hong Kong to develop his career. A real estate developer planned to acquire the land of Uncle Niu's tea house. Uncle Niu insisted on not selling it. Hui decided to steal the land deed and seal to sell the land. After being discovered by Uncle Niu, Hui panicked and knocked Uncle Niu down with a heavy object. Hui disobeyed his father and angered the ghosts. They no longer protected Hui, and the ghost of the hero finally had the opportunity to kill Hui. Hui died in a car accident. His soul returned to the teahouse and found out why his father had summoned ghosts in the past. Hui was filled with remorse. At this time, the ghost attacked Uncle Niu again. Uncle Niu made a deal with the ghost and was willing to exchange his life for his son's. When Hui woke up, he found that it was Uncle Niu who died in the car accident. From then on, Hui took over the teahouse and set up wine and offerings on every table at night to entertain ghosts and gods.