Song Liangyin, the daughter of a treacherous minister, is determined to ensure that the Song family has an heir. When Lan Wuyu, a Vice Minister of Rites, is ambushed and left in a desperate predicament, she sneaks into his secluded courtyard and spends seven unforgettable days with him. Afterwards, she slips away secretly, full of anticipation. Hoping to become pregnant, she plans to return to her hometown to carry the baby and give birth. Lan Wuyu has already discovered her identity and fallen sincerely in love with her. He intends to request an imperial decree for their marriage. However, Song Liangyin mistakes their encounter for nothing more than a fleeting affair. Upon discovering that she is pregnant, she immediately leaves for Liangwu. Four years later, following a family upheaval, Song Liangyin returns to the capital with her child, only to fall straight into Lan Wuyu's hands. Torn between anger and love, Lan Wuyu refuses to let her escape again.