Before the Double Rebirth, the Calamity Comes Back and the Knot Is Resolved

Su Zhiru, the legitimate daughter of the General's Mansion, and Mo Huaiyi, the king of Beichen, were childhood sweethearts. However, God's will tricked them, and an imperial edict destroyed their loved ones. The loyal prince was plotted by a villain. What choice did he make to avenge Su Zhiru? After rebirth, he only wanted to stay with each other for the rest of his life. How could it be that things went against his wishes? How would their mission be resolved? (Purely fictitious, created by the dynasty)