Iron Oath accepted the commission from the down-and-out explorer Ezra and stepped into the ancient ruins "Morning Star Corridor". Mechanisms, murals, and void rifts threaten their lives step by step, and a secret letter tears apart the secret game between the Holy See and the Blood Ax Empire. The border town was brainwashed by the hymn, and Iron Oath faced off against Sonara, the inquisitor of lamentation; in the Frostridge Mountains, Brendan shook the giant beast at the heart of the rock, and Frost was heartbroken and vowed to never be destroyed. Under the Psalm City, Sonara controlled thousands of people with the "Dance Finale", and Lumina interrupted the Psalm with the "Morning Star Judgment", but she met her sister's eyes in the ruins - their enemy was actually the same aloof father.
