Tamiya Yasaburou brought his german wife Elisabeth over to Japan during the Meiji period and built a whole mansion for her. Their shared happiness did not last long though and she left him and their daughter returning to her homeland. Ever since the mansion has become a baneful stage for 2 murders with numerous victims.
1990: One year after 5 of their siblings/cousins and the mansion's caretaker were found dead after they seemingly killed each other while all of the mansion's exits were locked, Tamiya Anna, Rui, Otohiko, Touma and 2 uninvited guests meet at the crime scene to figure out what tragedy actually brought forth this strange incident.
