Ahriman warriors stand in front of an old mansion that has been hidden underground for centuries. According to legend, they know that the mansion is protected by the Ahriman. They enter through the main entrance, but when the last of them has entered, they notice that the trap doors begin to slide shut. A voice in the mansion shouts, "You are buried here forever." When you find yourself inside The Dark Mansion, a one-vs-all game, you might consider it a grave, but as one of the fighters, you have tools on hand that can help you survive. Can you defeat the devil and get out of the mansion?