After proving himself on the battlefield time and time again, he was offered one of the most prestigious positions for an enlisted soldier: becoming a member of the emperor's royal guard. Little does anyone know that he were once a prince of a distant civilization whose world was conquered by the very empire he now serve. Since the invasion, he have done everything he can to infiltrate the emperor's palace and assassinate him. After concealing his identity for years and ravaging the worlds of other civilizations, he finally have the opportunity to exact revenge on the man who took away everything he onces held dear.