Suzuran Manor

In a noble family with a history of over a hundred years, the first heir suddenly dies. Soon afterward, two police officers arrive at a white manor that looks like an ancient castle, only to find themselves trapped there along with everyone else. A blizzard rages outside, cutting the manor off from the world like an isolated island. With no way to escape, its inhabitants die one after another, while the killer vanishes like a ghost, ready at any moment to devour the few lives still left in the manor...