'Yin Yang Road Fifteen: Guests Come As Souls') is a 2002 Hong Kong comedy horror film produced by Nam Yin and directed by Jamie Luk.
She suggests that he operates a food stall at night to attract some ghost patrons and ask them to protect his family from Keung.
If the land is sold, Ngau will lose ownership of the food stall and the ghost patrons can no longer protect his family.
Fai knocks his father unconscious, steals his seal and signs a contract with Sally to sell the land – only to realise that she has deceived him.
Although Ngau's friends manage to destroy the contract later, it is too late as Keung has already caused Fai to die in a car accident.