Due to a past incident, Katalina feels indebted to Vira and wants to provide her support after the many years of pressure and loneliness Vira has endured as Lord Commander.

Lyria, Io, and Orchis have been swallowed by Celeste. Left behind, Gran and the others search for a way to save them, along with a ghost girl, Ferry, whom they met in the village.

The Black Knight, trapped by her own past, is set on attaining Lyria's power, but Gran vows adamantly to protect Lyria. Their unwavering beliefs clash, neither willing to bend.