The Duke's Secret Princess

An adopted daughter learns she is Rosalind, the princess of Prince An's Estate, and returns to her family. She faces a political marriage alliance with the Khitan Empire, but her adopted sister, Jocelyn, is sent for the marriage. Rosalind marries Jiangting Stanton, son of Duke Stanton. She endures household conflicts and border wars. With Jiangting Stanton, she resolves crises, finds her brother, and leaves the court for a peaceful life with her family.