At first glance, Aurora Edelweiss appears to be an ordinary girl— but in truth, she possesses a rare ability that allows her to communicate with the spirits of the dead. With no family to rely on, Aurora has used her powers to earn a small living. One day, however, an anonymous letter sets her on the trail of a mysterious spiritual artifact known as “the Essence of the Soul.” What exactly is the Essence of the Soul? Does it truly exist at all? And who else might be seeking it besides Aurora…? As she searches for answers, Aurora becomes entangled in unimaginable supernatural phenomena that put not only her own life, but also the lives of her companions, in grave danger— A haunting supernatural mystery begins.