「I don't know where I am... Is this a dream, a nightmare? Save me...」 -- Ruki

Ruki wakes up from a nightmare drenched in cold sweat. He gets a call saying Aoi went missing. Disapeared without a trace. The next day, the same thing happenes. Why is it repeated? Ruki wonders. Does it have something to do with the reoccuring nightmares he has? The nightmare is just beginning...