He Replaced His Brother Who Died in the War and Married His Prospective Sister-In-Law.

The Queen of Beichen Kingdom gave birth to twin dragon sons. In the royal family, twins are seen as fighting for the pearl, which is unlucky for the country. The imperial concubine's powerful relatives wanted to take advantage of this matter to attack the empress. The empress had no choice but secretly ordered her second son Yu Wensheng to be quietly sent out of the palace and fled to Wuyou Valley on the border of Beichen. To the outside world, she only said that her second son had died in infancy. The eldest son Yu Wenheng was established as the prince. He was both civil and military, kind and powerful. Nineteen years of peace suddenly changed. Prince Yu Wenheng went on a military expedition in person, but was assassinated by a group of noble concubines and died on the battlefield in the north. The country has no heir, foreign enemies are pressing on the territory, and the situation in the country is in danger. Yu Wensheng, who was far away in Wuyou Valley, was secretly recalled. In the name of the prince, he went out to fight on behalf of his brother to resist Nanliang. He bears the identity of his deceased brother, sits in his East Palace, controls his military power, and has to face the would-be crown princess. Little did he know that this princess turned out to be Bai Yueguang, whom she had hidden in her heart for several years! The heavy burden of family and country and the treacherous nature of the court forced him to lose his moon. When the world is peaceful and the war subsides, can his little moon come back?