The narrative resolves its central mysteries through several pivotal revelations:
- The Love Potion Mix-Up: Hong-jo's love spell (Aejungseongsasul), meant for Jae-kyung, was accidentally consumed by Shin-yu, sparking his sudden obsession.
- The Past-Life Tragedy: In Joseon, Shin-yu was the noble Jang Mu-jin and Hong-jo was the shaman Aeng-cho. Framed for cursing the Crown Prince by royal schemers, Aeng-cho was sentenced to dismemberment (Geoyeol-hyeong). To save her from agonizing torture, Mu-jin mercy-killed her with a dagger. Her dying touch left a bloodstain on his face along with a vow of love, which manifested across centuries as Shin-yu's psychosomatic 'curse' born of his own unresolved guilt.
- The Antagonist Defeated: Modern landscaper Na Jung-beom, who murdered his wife on Mount Onju and used dark blood magic to target Hong-jo, stabs Shin-yu. Shin-yu recovers his memories while comatose, breaking the curse, while Jung-beom and the corrupt Mayor Yoon are arrested.
- Ending: Fully healed, Shin-yu and Hong-jo bury the spellbook chest in the beach sand, and Shin-yu proposes to Hong-jo, securing their shared, self-chosen future.