In the Dasheng Dynasty, the imperial power seems to be stable, but in fact, there are undercurrents surging in the court. Princes are vying for the throne, aristocratic families are seizing power, and the East Palace is the center of the whirlpool that is closely watched by all forces. Prince Xiao Jingyuan worked step by step, forbearing in planning, thinking that he would be trapped in a chess game of power all his life, until one rainy night, he picked up an injured little civet, which completely broke the silence of the East Palace, and a deep palace love between a man and a monster that was different but sweet to the bone began.