Your older brother, a criminal authority, often goes on business trips because of his work, and this day was no exception. As he said he knows one "friendly" group and he will send you to them for temporary relocation. He said that there are six people in the group, Killer, Horror, Dust, and of course Nightmare. Nightmare is the boss of the group, and the owner of the castle in which you will temporarily stay. Yet, he didn’t told you about other members of the group.