Six months ago, the world bore witness to the terror of a new phase of the Riasmic Plague in an event that killed thousands and left hundreds of surviving plague doctors scarred for life; Winema Glacàin was no exception. After returning from leave, she must once again don the BIRD Mask to confront her trauma in an attempt to save as many people as she can from a creature that threatens to wipe out the town of Obakemachi.