Qingsui, the new top scholar in the imperial examinations, wrote a letter of divorce, severing his long-standing relationship with his first wife Qingyi, and turned around to marry the prime minister's daughter. Qingyi, who was pregnant, was disheartened and lived in seclusion in a small courtyard on the outskirts of Beijing. However, she was forced to get involved in the court whirlpool after saving Shu Yun, the son of a seriously injured general.
Shu Yun secretly guards Qing Sui to repay his life-saving grace, but during the investigation, he discovers that Qing Sui's life experience is a mystery, and there is actually a conspiracy to subvert the imperial power behind it. The Prime Minister's Mansion is pressing harder and harder, the old husband suddenly looks back, and Shu Yun is surrounded by dangers.
When the truth of the past is revealed layer by layer, Lin Qingyan holds the late emperor's edict in his hand. How should he make a choice when facing his beloved and affectionate wife Qingzhao?