500 years ago, Weolju healed the Crown Prince through his dreams but was falsely accused of seducing him, and was targeted by an assassin who killed Weolju's mother instead. Weolju's sin was committing suicide on the Sacred Tree, causing it to lose its power on the edge of a conflict that, consequently, took 100,000 lives. For these past 500 years, she was sent to the Living Realm to settle the grudges of 100,000 souls and comfort them as a punishment to atone for her past sin.