Xiao Ji, Shaoqing of the Soul-Suppressing Department, was ordered to escort the nine-tailed fox demon Bai Li, but during the theft of the bronze coffin, he discovered that their souls had been entangled for hundreds of years. When the demon elixir and the chain melted together, and the Gate of Return to Ruins under the blood moon swallowed up the three realms, she burned her tail and carved the ancient seal "No Regrets" to shake the heavenly gate, and he turned into a star chain to fill the sky. The candied plum box contains three hundred years of cause and effect, a newborn baby comes to the world holding a bronze key, and the demon patterns and chains woven among the ruins are eternal curses or a prelude to Nirvana?