In the ancient Cangwu wilderness, the Qingqiu tribe took root in the perennial fog, relying on natural gifts and the blessings of their ancestors for their survival for generations. Recently, the tribe has been shrouded in strange shadows: the bonfires of the sacrificial ceremony were extinguished three times for no reason, and twisted lines appeared in the ashes; sleeping tribesmen would be awakened by the same obscure nursery rhyme, and their memories would be incomplete after waking up; on the stone walls of the border ruins, new blood-colored totems that no one could decipher were added every night. She is the most talented apprentice of the witchcraft in the tribe. She can sense the secret atmosphere flowing between heaven and earth. However, because she strayed into the ruins when she was young, she was regarded as the source of strange things by the clan elders. In order to clear the suspicion and find her missing younger brother, she stepped into the depths of the mist against the suspicion of her tribe. The wind in the ruins carries the smell of decay and vitality, and the ancient trees twist into strange postures in the night. The prying eyes of aliens, the taboos that have been sleeping for ages, and the secrets hidden by the tribe are unfolding in front of her eyes. The fetters of emotion and the temptation of truth pull against each other, and trust is crumbling in suspicion. She must understand the secret words left by the ancients before the darkness swallows everything, and uncover the astonishing truth hidden under the fog and dust.