When they met in the martial world, the young pair vowed to sail together and share an empire. Mu Qingyin, daughter of a general, cast aside her chivalrous life to accompany the fallen prince Xiao Yi through a bloody struggle for the throne. But imperial power gnawed at the soul, and suspicion grew like a rampant vine. The grief of losing a child was followed by the massacre of her family. The oath they had made beneath the moon all those years ago turned to ashes. Wearing the red dress she had on when they first met, she set fire to the palace and died, leaving the emperor to rule a vast empire alone in his empty halls, condemned to a lifetime of endless regret.