Due to a statue, Helen unexpectedly traveled to a different world and thus met the Thirteen Clans of the Blood Clan and the werewolf Caesar. She possesses extraordinary swordsmanship, saving slaves trapped in a tragic fate and leading this group towards new hope. However, what is her identity, why did the mysterious statue lead to her journey, and will she become the successor of the underworld king in mythology?What choice will she make when an accident sends her back to the real world when she wants to figure everything out?