After the empress passes away, the emperor becomes obsessed with the idea of summoning spirits. Princess Liu Pei, the one who set the events in motion, leaves the palace with her childhood sweetheart. Along the way, they meet the Daoist Xu Hao. The three of them solve strange cases, expose superstition, and persuade the emperor to abandon his beliefs in ghosts and spirits.
Those who have once been bathed in moonlight still carry its brightness in their hearts, even when the moon is nowhere to be seen.
The romance has a bad ending.
