Liu Yun, a historical researcher, was looking through materials in the library when a sudden flash of lightning and crash of thunder knocked her unconscious. When she woke up, she found she'd transmigrated into the body of Princess Pingyang, the elder sister of Emperor Wu of Han.
Life as a princess couldn't be too bad, but then a strange voice told her to help Wei Qing, a horse servant in her household, find true love. Fine, she'd do it. But he was only ten years old right now. What was she supposed to do when he was so young? With no other choice, she decided to raise him well for a few years first.
As she raised him, she realized her young horse servant was becoming more and more exceptional, while she herself increasingly wanted to be near him. To complete the tasks laid out by the System, Liu Yun arranged marriages for the horse servant Wei Qing in every way she could, entirely unaware that she'd already fallen for him.
A few years later, Liu Yun was widowed. Her former horse servant, now the great general Wei Qing, had also been a widower for several years. Emperor Wu of Han, Liu Che, was determined to find a husband for his elder sister, and everyone said only Wei Qing was worthy of her. After overcoming many obstacles and clearing up their misunderstandings, Liu Yun finally found true love for Wei Qing. But then Wei Qing told her that his true love was the princess herself. Liu Yun was stunned. It turned out that what she'd thought was just her imagination had been real all along.
At last, the two of them lived happily ever after...
