One imperial edict, two misaligned lives. Su Jinse, the legitimate daughter of the Shangshu Mansion, was supposed to be the lord of the Eastern Palace, but due to her stepmother's scheme, she married a sick and weak feudal prince from a distant country. It was bitterly cold in the north, her husband was lingering on his sick bed, and there was a turbulent undercurrent in the house. She used rouge as a blade to lay a dragnet between her brocade skirts. Qin Shuangren, the number one killer in the world, was charged with a blood feud and was ordered to sneak into the palace to assassinate her. However, she became the most inconspicuous mute maid beside her. When a false covenant meets true protection, when rouge is mixed with rust and blood, two women who are destined to go against each other accidentally intertwine in the gap between power and survival and create a shocking chess game that overturns the dynasty. Is the sharpest thing in the world a poison-quenched dagger, or a glimmer of light that never goes out in desperate situations?