Thread:LucidPigeons/@comment-2175012-20160509175734/@comment-2175012-20160512232749

Well, the film in question is actually a Japanese thriller film known as "The Untold Story," which is supposedly (read loosely) based on a real account. The film concerns Mr. Wong Chi Hong, a waiter at a restaurant known as Eight Immortals. He murders the owner  and his entire family after a disagreement in a mahjong game, which he cheated at. He takes over the restaurant and attempts to hide the bodies by dismembering them, and then throwing them into the ocean.

An arm is discovered at the beach, and it's eventually deemed to be of an old woman, who's son-in-law owned the restaurant. As the race to catch the killer heats up, Wong quietly disposes of two of his employees, fearing that he might get found out. He then takes their flesh, and mixes it with barbacue hot buns; the customers aren't the wiser.