Description: Welcome to the Rokkenjima of October 4, 1986. You have been given a chance to catch a glimpse of the family conference held annually by the Ushiromiya family. Who will gain the old head's vast inheritance? Where is the 10 tons of gold that the old head is said to have hidden? In the midst of this, a suspicious letter is sent from one claiming to be a witch. The presence of a 19th person on this island, which should only have 18, begins to hang in the air. Brutal murders repeat, and unsolvable riddles are left at the scene. How many will die? How many will live? Or will everyone die?