Insomnia is a battle often lost. And when it interferes with your job, that's even worse, not to mention the incredible toll it takes on your health. Y/N is a fighter of insomnia, while juggling her job as a detective. The leader of the force notices this and makes it his job to help. But have you tried to sleep when a dangerous killer who seemingly uses "magic" on his victims will stop at nothing to kill you and anyone else in his way?