During a prime minister's estate poetry gathering, the humble scholar Shen Yan and the prime minister's eldest daughter Su Wanqing fell in love at first sight. As they spent time together day after day, the two came to understand each other and fell deeply in love, but they met with the prime minister's utmost opposition. Shen Yan resolved to abandon literary pursuits for a military career, and after making a vow of a ten-year return period, he went far away to the borderlands. Ten years later, Shen Yan returned with great achievements, becoming the Protector of the Country, only to discover that the prime minister's estate of yesteryear had long since changed beyond recognition, and people were no longer the same.