Jun Hui Wen

Wang (Chun-fai Man) was a twelve-year-old child with learning difficulties. He was not mute, but he has never spoken a word. Wang's mother always said that his father had been to a faraway place, claiming that when the plastic flower bloomed, his father would come back. Later, when Wang was six, his mother jumped off from the window of their home and died. Wang thought that his mother had just flown to meet his father. (asianwiki)

Incomplete body parts are being accidentally discovered. Macau cops call for investigation into the case and reveal a grisly murder behind the story of delicious buns. Years ago, Wong, an employee of Eight Immortals Restaurant, cheated on gambling and was found out by his employer. Wong was mad and killed the whole family of his employer and destroyed the evidence by serving the customers with pork buns made with the human flesh from the bodies. (The Movie Database)