Hé Yanyu is a princess of Su empire, she's the most unfavored princess of all because she was a mistake that was created by her father, the emperor with a insignificant maid.
The enemy country of Lou has asked to temporarily end the war if they compensate it with one of their princess. The princess was to be married to their emperor as a concubine.
Since the Su Empire 's king hate the Su kingdom to the bone he sent his most unfavored Hé Yanyu to the enemy country.
