As a priestess paid to guide the deceased home, Kang Siying has never feared death. But when her father collapses due to his declining health, Siying realizes that even she is not free from the cruel grasp of mortality. Desperate to save her father, Siying accepts a dangerous job and travels through enemy territory to retrieve the corpse of a missing prince. But the moment Siying places her talisman on the dead prince's head, the prince comes back to life. Worse, he won't stay alive for long -- not unless he absorbs enough qi, or life force, to keep his soul anchored to his body. In return for a reward worth twice her original commission, Siying agrees to aid him in finding and purifying evil spirits for their qi. But as they journey across the countryside, encountering vengeful ghosts and enemy spies alike, they gradually uncover dark secrets about the prince's death -- secrets that could endanger both Siying's father and their entire kingdom.