After discovering that the Book of Life and Death has been tampered with while treating departed souls, Su Wanyue, a physician in the underworld, joins forces with the mysterious Netherworld Envoy Lu Chenyuan to fight the supernatural organization Netherworld Bureau, which is altering the cycle of reincarnation. As they unravel a thousand-year conspiracy, she uncovers the truth about her previous life: she treated her deceased husband and fell into the cycle of reincarnation.
