Awakening in a mirrored incarnation of Fuyuki City that feels eerily familiar, Illyasviel "Illya" von Einzbern is disoriented and alone. She discovers her home in ruins, a massive crater dominating the town"s center. With snow drifting during midsummer, confusion swallows the young elementary student who cannot find her friends or her spellbook Ruby. The sky is overcast, and the streets echo with strange silence.
Reaching the skeletal remains of her house, she is suddenly grabbed by a girl with amnesia. Dressed in a track suit as the cold deepens, the mysterious newcomer knows nothing of her location or purpose. Yet this stranger, named Tanaka, seems to hold information about Rin Toosaka, Miyu Edelfelt, and Illya"s other missing friends. She wonders if anyone else survived the catastrophe.
Escaping from agents of the Ainsworth family—who rule this alternate realm—where will these two find themselves, and how can Illya restore the timeline to the world she once cherished? Her heart races with dread and fear.
