Fan Renka is a court lady who joined the emperor's harem as a weaver. Although she is blind, she is able to obtain delicate information which can't be seen to the naked eye. With this ability, she will be able to shed light behind the supernatural apparitions that are occurring in the palace. However, when the emperor approaches her in order to reward her for the services she has rendered, she becomes aware of "a certain secret" that will shake the foundations of the palace.