Imprisoned in Fangzhao Palace for ten years, the eldest princess Xie Wanyi became a madman that everyone avoided.
She walked barefoot through the frost and snow, drawing star maps that no one could understand on the mottled palace walls, day after day, waiting for the opportunity of revenge.
Everyone thought she was a loser, until Jiang Qingluan, a calm and self-possessed young medical officer from the Imperial Hospital, knocked on her dusty palace door.
Qingluan can understand her star map, understand her crazy words, and even use a dose of "Xiaoyaosan" to break her disguise.
She said: "Princess, in the eyes of doctors there is no sad Vega, only Antares who follows the way of heaven."
Thus, the desperate chess game ushered in the only variable.
From the temptation led by "Jun Yao", to the sacrifice of life to protect each other on a thunderous night in the back mountain; from the chess theory on the rocks by the stream, to the promise of retreat on the cliff under the moon.
In the dragnet set by the regent, they stole a dreamlike time.
Wanyi believed that Qingluan was the only light in her gloomy life and the hope that could lead her to escape from this golden birdcage.
She once wrote her name on that man's palm, promising that if the injustice could be redressed, she would give up everything and live in seclusion with her.
She didn't know that when she used love as her weakness and her body as a chess piece, this chess game with the country as the bet was already doomed to lose everything.
Intention: the eternal conflict between individual will, destiny and responsibility