Huaniang, the high-ranking inner palace consort who lives at Yuanqian Palace, comes to Ye Ming Palace. She wants to know why her flower whistle will not blow. Flower whistles are hung from the eaves of buildings at the end of winter to mourn those who passed away the previous year. Allegedly the dead return on winds announcing the coming of spring to blow the whistles. Huaniang is concerned that her whistle has not blown since she lost her lover Ou Xuanyou. Shouxue complies with her request and attempts to summon the soul of Ou Xuanyou so she can speak to him.

Two ghosts from Gaoujun's past continue to haunt him, as Shouxue and the eunuch Wei Qing investigate the cause. The answer may lie in the depths of the red-light district...

Shouxue searches the storehouse for the ghost's gemstone, while Gaojun investigates the Raven Consort's secrets.

Shouxue must solve the mystery of the ghost that appears beneath the willow tree, and the two ghosts that appear in the emperor's chambers.