Aria, a 17 year old student can't differentiate between computer game and reality anymore, which is why she is in therapy for.
With confrontation therapy her psychotherapist forces her to play "minotaur", the game she used to play all the time and now tries to avoid. Thus upon entering the game, her normal school turns into the gameworld, a maze with the goal to find the treasure in the middle and defeat the guarding Minotaur. But what she finds in the center of the labyrinth is not a treasure, but her own dark past and a deep seated guilt, which made the boarders between game and reality become blurry in the first place.