A tiny parasite decides to feed on Luna Lynn, a young genius about to forge a contract with the divine Vermilion Bird, to ensure its survival. Luna, the granddaughter of Principal Lynn, faces immense pressure as her family hopes to restore their fading reputation after centuries of decline. As Luna begins the ritual with her primordial blood, observers anxiously watch her progress. She almost succeeds in summoning the infant Vermilion Bird, but suddenly, a celestial anomaly interrupts the process, leaving her contract uncertain and raising new challenges ahead.