In modern times, there have been fewer and fewer serious Taoist priests and goddesses, but the number of ghosts and monsters has not decreased. Due to work pressure, the underworld established the Requiem Chinese Medicine Company in the human world, specifically recruiting humans to work as ghost agents to assist in soul calling. Kuisheng encounters Bai Xun holding a female ghost on a chain and walking on the street, and is drawn by Bai Xun to become his apprentice.