Wen Ruchu, the daughter of the Imperial Tutor, was forced to marry Xiao Jingming, the prince who had been "stupid" for ten years. Both the government and the public lamented that she was secretly betraying her. On the wedding night when the candles were burning brightly, he held the candy and smiled foolishly. She lowered her eyes, but the secret message on her sleeve contained clues to the Wen family's injustice.
From then on, the East Palace became a stage - he made her squat in the corner and count ants, and she helped him knead mud to build a city. He asked "childlike words" about the hidden worries of governing the country, and she smiled and smoothed things over: "Your Highness is playful and serious." Until that day, when he looked at the mud city and blurted out the essence of "Governing Policy", she covered his mouth with her backhand: "Pretend to be stupid and be attentive."
The moment the fingertips touched, two pairs of clear eyes broke through the ten-year mask. It turns out that she had known that he was a dormant lone wolf, and she accompanied him in this scene just to find out the truth about her father's imprisonment. He also saw through the forbearance in her eyes, and used his stupidity to protect her, but he also hid his ambition to subvert the chess game.
The mud is a chess piece and the palace walls are a chess game. When an old case involving the Wen family involves the secrets of the late emperor and a conspiracy to seize the heir, this dramatic couple goes from testing each other to breaking the chess game side by side. In the heart-wrenching courtyard of the East Palace, they play an unprecedented chess game with their lives at stake and their sincerity at stake.