Hiroko lives a quiet and lonely life in the city. She studies hard at school and works hard at work. However, when she meets a certain rude and mysterious young man at her workplace, everything begins to turn upside down. A monster from her dreams has escaped into the real world and kidnaps her best and only friend. How can Hiroko outwit her Nightmare in order to save her best friend? And what unexpected alliances will she have to make in order to do it?