One day, at the behest of their school club, two friends, Yumi and Kyoko, are sent to participate in a test of courage. Little did they know, they arrived at a wrong location and found themselves before a towering, eerie-looking mansion. Unawares, Yumi rushed inside, with the hesitant Kyoko struggling to keep up. Before long, the two became separated and soon found that something was terribly wrong. There are demons everywhere, after their souls! And if they get caught, a never-ending madness awaits them...