Tang Yuanhe's fifteenth year. The day of Gengzi in the first month.
In the palace, the emperor and his favorite concubine woke up from their dreams and found themselves imprisoned in incomparable darkness.
Outside the city, old trees suddenly bloomed in the snow, and a mysterious woman in red appeared and disappeared suddenly. Some people witnessed Orchid dancing on a rope falling from the sky, but no one saw her body landing... One after another mysterious cases that seemed like ghosts and gods gathered in Chang'an City overnight, with bloodshed, conspiracy and screams, no one from the royal family to the common people was spared.
In the whirlpool, the person who could solve the problem was actually a Taoist priest named Ye Yinyun.
Before dawn, the banquet will end. Can Ye Yinyun break the one-day situation, save Chang'an, and save his beloved? And can he hide the terrible secret deep inside him?
