Ning Xiyue, a spirit-burial servant of the Crimson Fox Clan, was born with the ability to hear the thoughts of young cubs that have yet to take human form. During a spirit-burial procession, she discovers that Yan Zhao, the imperial grandson who was supposed to be buried, is still alive. Risking her life, she rescues him and becomes entangled in a secret royal conspiracy. Prince Regent Yan Chenzhou initially distrusts her, but after a blood formation diagram, mysterious notes, and bizarre sacrificial rites emerge one after another, he joins forces with her to uncover the truth. Zhu Xuandu, the chief officiant of the Qilin Transformation Altar, and Consort Zhuang are secretly plotting to seize the imperial grandson's spiritual meridians and fabricate a royal heir. With her expertise in funerary medicine and her ability to hear the thoughts of young cubs, Ning Xiyue repeatedly exposes deadly schemes and protects a tiny life amid the power struggles of the imperial palace.