Ling Sie-Cheong, a businessman whose boss permits him to occupy a luxurious but long vacant house, rent-free, Ling not being aware that the palatial residence was where an entire family was murdered but has remained upon the premises as ghosts and, shortly after Ling and his parturient wife (Pat Ha) move into the home, she suffers serious pregnancy complications through ghostly interference and is subsequently hospitalized.
The "Five Lucky Stars" attempt to help a restless ghost take revenge on the evil drug gang who took his life. At the same time, they want the ghost to help them get rich and court the four policewomen assigned to the case.
Every 50 years a cat demon has to be killed by a Cheung family member until the body-hopping feline demon's 9 lives are up. This time it falls on the shoulders of Master Cheung. He is afraid of cancer killing him before he can stop the demonic force, so when Long comes to him after his boss gets possessed, he tries teaching him his family's Mao Shan magic hoping to pass it onto him since Cheung's bloodline stops with himself.
Wisely, the famous writer/adventurer, traverses to Taiwan, Egypt and Nepal on the hunt for a magical pearl that may expand human consciousness, said to be left in a Buddhist monastery by a dragon.
