The Regent Princess is Beautiful and Fierce

A 21st century female agent accidentally travels back in time and becomes Yan Wushuang, the foolish eldest daughter of a duke's mansion. Right after arriving, she saves Prince Pei Yan, a war god who was being hunted down. Money-loving Yan Wushuang can't resist the prince's generous payment and agrees to escort him back to the capital. Their feelings gradually warm up through their chaotic interactions. Facing the crown prince's conspiracy, what fate awaits them?