When demons begin flooding out of Makai into Gensokyo without explanation, shrine maiden Reimu Hakurei tracks the source to a cave behind the Hakurei Shrine leading into the demon world. Marisa Kirisame secretly follows, hoping to steal unique powers, while Mima and Yuuka Kazami head to Makai for their own reasons. Inside, the heroine defeats Sara at the gateway, battles Louise mid-flight, then faces Alice Margatroid and her living dolls above a dark city, followed by witches Yuki and Mai. At the top of fortress Pandæmonium, Shinki — the god who created Makai itself — reveals that the invasion is merely a civilian tourist operation, then punishes the intruder so severely that much of Makai is left burning. In a later encounter, Alice returns wielding a powerful grimoire but falls a second time before fleeing.