At the junction of the human world and the underworld, there is a group of special beings - the underworld ferrymen. They shuttle between the human world and the underworld, helping those souls who cannot rest in peace due to unresolved obsessions to fulfill their wishes. Yun Qianlan is one of them. She possesses powerful spiritual power and a mysterious bell, which not only connects her past and future, but also hides secrets about the fate of hell and the world. In the process of solving the obsession of the soul, Yun Qianlan gradually discovered the mysteries of his memory and identity, as well as the huge conspiracy hidden behind these mysteries. She must face dual threats from the underworld and the human world, uncover the secrets of her life experience, and at the same time protect those innocent souls from harm.
