Ten years ago, on the night of the coup, the little princess Xiao Ruoxi "disappeared". The childhood sweetheart Mu Jinyuan lost his love and gradually became the powerful regent. Ten years later, she returned to the court as a frail and useless princess, but she was actually the young master of Langya Pavilion who was highly skilled in martial arts and ruthless. On the surface, he neglected her and got close to the three princesses, but secretly he laid a web of revenge.
The two met again in the chess game of power, each wearing a mask, testing each other and misunderstanding each other, but they both guarded silently in the dark. It wasn't until a well-planned wedding that the truth was revealed amidst the flash of swords: he paved the way for her with his "cruel heart", and she ended up ending it for him with her life. She was seriously injured and on the verge of death and lost all her martial arts skills. He resigned and went into seclusion. In the end, in the small courtyard in Jiangnan, he made tea and she planted flowers, and the old sword tassel dangled in front of the window, witnessing the deep love and sacrifice from the bloody storm in the palace to the fireworks in the world.
