A sudden elevator accident caused the soul of a modern emergency doctor to travel through time and space and fall into the depths of the cold palace of the Great Xian Dynasty. When she opened her eyes, she was Lin Yaosheng, who was tortured to the point of dying by the red flower ointment - the daughter of Yangzhou Weaver. Because she had a similar appearance to Emperor Xiao Chengyu's late childhood sweetheart, Concubine Ning, she was charged with "colliding the holy face" on the night she went to bed, and was imprisoned in the cold palace for three years. The chronic poison hidden in the daily decoction, the charcoal fire that is rarely seen all year round, and the wanton bullying of the palace officials pushed the life of this seventeen-year-old girl to the edge of the cliff.
When the calm doctor who is used to life and death encounters the treacherous harem plot, everything quietly changes. She used the silver needle as a blade and relied on modern first aid knowledge to forcefully extend her life; using the emperor's obsession with his old love as a shield, she cleverly aroused Xiao Chengyu's fear of the influence of his relatives. Amid the Queen's suppression and the wise concubine's calculations, she saw through the vicious schemes time and time again, used modern medical knowledge to treat the seventh princess, and won the favor of the Queen Mother, step by step from a humble maid in the cold palace to a concubine.
However, every step up the ladder comes with deeper despair. She gradually realized that she was just a pawn in Xiao Chengyu's hands to check and balance her relatives. When she was about to uncover the core secret of the case of Concubine Ning falling into a well, in order to stabilize the imperial power, the man who had risked his life to save her in modern times pushed her into the forefront of the storm.
In this game that begins with a substitute and ends with the truth, love and hate are intertwined, and conspiracies are dense. Within the red walls of the deep palace, bones are piled up to form a ladder leading to power. Can she break free from the shackles of a substitute and rewrite her tragic destiny? And there was something between her, Xiao Chengyu and Concubine Ning.
