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Jiang Yingxian, the second daughter of the Jiang family, defies societal norms by taking over the family business. She hires Fu Cheng, a principled but low-born man with his own hidden agenda, as her personal bodyguard. Despite their differences, a forbidden romance blossoms. However, as she faces an arranged marriage and he enlists in the army, their love is tested by duty, ambition, and the chaos of their nation.