She is the leader of a secret group with expertise in poisoning and assassination, and is considered both brilliant and peculiar by others. When she unexpectedly dies, her soul inhabits the body of a severely disfigured woman. Renouncing her former identity, she cuts all ties with her family but is plagued by doubts about whether she can uphold her title as "The Ghostly Doctor" without exacting revenge on those who harmed her. Meanwhile, fierce warriors compete to become the most powerful amid an approaching conflict. How will she assume her role as "The Ghostly Doctor," wearing her crimson cloak, and confront these formidable challengers to dominate the world?