Grand Tutor Su Yan was convicted of "collaborating with the enemy", and his legitimate daughter Su Ci changed her name and surname and sneaked into the regent's palace to work as an aide.
She wanted to borrow Regent Shen Du's sword to avenge the three hundred and seventeen members of the Su family.
Shen Du knew she had a secret, but he didn't reveal it - what he wanted was a sharp knife.
The two were each other's pawns and used each other, but in the process of testing each other step by step, they became sincere towards each other.
When Su Ci finally got the evidence, she discovered that Shen Du had already known her identity.
She thought she was the one holding the knife, but she didn't know that she had always been the blade in his palm.
——But her blade can bite the master.
Purpose: "In the chess game of power, no one is a pure pawn. Everyone who is used can choose to fight back.