After the Urbanus locates the Silvana and ensures its safety, Sophia returns and is surprised that Claus has been taken. Covenant Day arrives, and Dio takes part in the Trial of Agoon to claim inheritance of the Maestro's position by participating in mortal combat against other Principals. Claus, who cannot bear to see Dio fight, worries that he may die. At the same time, the operation to capture Guild Claudia units commences at Horizon Cave. On the Silvana, Lavie finally completes the repairs of her and Claus's vanship. Delphine takes Alvis and Claus to the location of Exile, where they find its defense system has begun attacking Guild ships as well. Exile attacks Delphine's ship but stops when it senses Alvis's presence. Delphine reveals that Exile is a colony ship used by those who first settled on their world. Alex, who has been injected with a truth serum, recites the Mysteria, and Alvis responds to each one. However, he reveals that he has not read the final Mysterion before entrusting it to Sophia. Delphine then receives word that Dio is the Trial's victor.
