王志恒（吴岱融饰）是八仙饭店的伙计，被老板发现他赌博出千，终与老板翻脸，一时冲动竟将老板一家八口全部杀掉！为毁尸灭迹，他将八具尸体分尸并用人肉做成叉烧包，竟因其美味远近闻名。一个偶然的机会，被王埋在山上的人骨被人发现，澳门刑事侦察科的警官（陈明君、孙国明、麦伟坚饰）被卷入这个惨绝人寰的案子……

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. Unexpectedly, the restaurant has become famous for its delicious pork buns since then...