Isaac and the Black Sword Knights are responsible for training the Maihama army. While he's in Maihama Isaac gets to know the new crown prince of Maihama, a young boy named Iselus.  Iselus respect looks up to Isaac and respects him.
At a party for the crown prince's birthday, assassin's make an attempt on his life.
What do you mean?
Wie meinst du das?
¿Por qué?
Qu’entends-tu par là ?
Che vuoi dire?
Como assim?
Объясни, пожалуйста.