She married into the Marquis of Jing'an on behalf of her deceased sister, and her only task was to copy an old letter from her deceased sister every day in order to keep the Shen family safe.
She thought she was a substitute, a tool, a substitute living in the shadow of her old friend.
But the square inkstone was handed to her by her eldest sister before she died. In every "old letter", starting from the first one three years ago, she was the one holding the pen.
Gu Changyuan, the Marquis of Jing'an, was cold, stern, taciturn, and unfathomable. On the wedding night, he brought the first letter and ordered her to copy it - the words on the letter were actually written by her, and the signature date was long before the engagement. The person he married was never the legitimate daughter of the Shen family.
She asked him: "When did you know?"
He replied: "From the first letter."
"Then why didn't you tell me earlier?"
He was silent for a long time and said six words: "Because I'm afraid you will run away."
The ink is the evidence and the pen is the oath. He had recognized her handwriting early on, but he was willing to accompany her in this stunt just to keep her by his side. But the undercurrent in the court, the scheming of the aunt, and the truth about the death of the deceased sister - this chess game that started with a letter is far deeper than they imagined.
