Su Jinning, an embroiderer from Suzhou, had a life-long private engagement with scholar Gu Yunzhou, expecting her sweetheart to propose marriage as soon as she became famous. However, all expectations were shattered by an imperial edict to enter the palace - three days later, she would be sealed in a deep palace, trapped in a high wall and never lose her freedom.
Although her father Su Chengan was worried about his daughter, he did not dare to resist due to the emperor's power and only advised her to accept her fate. But Su Jinning didn't want to let down her lover, let alone become a pawn in the palace. She disguised herself as a man and sneaked out of the house to consult with Gu Yunzhou, but unexpectedly discovered that the emperor's choice of her to enter the palace was no accident, and there was a secret hidden behind it that even her father didn't know about.
On the one hand, there is the risk of family destruction that is difficult to disobey the imperial edict, on the other hand, there is the love of life and death, and there is also the unexplored conspiracy in the imperial edict. Su Jinning can only embark on the dangerous road of escaping from marriage, using needles as blades and embroidery to convey information. While tracing the truth, she joins hands with Gu Yunzhou to fight against the imperial power and fight for her own way of survival.
