It is rumored that there is an ancient country in the south of the Yangtze River, named Yongning Kingdom. There is a prince in the Yongning Kingdom, named Su Yan. Su Yan has a bodyguard named Xu Qingran. The two have had a good relationship since they were young, and this is where their story begins.
On Su Yan's 17th birthday, 18-year-old Xu Qingran gave Su Yan a jade pendant and said it was a token of their love. Su Yan also made a promise to Xu Qingran that when he became the king of the country, he would marry Xu Qingran as his concubine. However, neither of them expected that within two years, Xu Qingran was thrown to the battlefield by the old king for some reasons. Su Yan thought it was just a short separation, but he never imagined that this time it would be a life and death parting.
Purpose: The prince and his bodyguard made a lifelong commitment, and the bodyguard was gone. Later, the bodyguard came back to life, and the two of them retired to seclusion.