Yagokoro Eirin suddenly appears at the Hakurei Shrine. She places a request for Hakurei Reimu to resolve an incident. Meanwhile, the incident progresses in accordance with the plans of Shameimaru Aya. A battle unfolds in the Garden of the Sun. Kazami Yuuka clashes with Reisen Udongein Inaba! Reisen's past is revealed in the midst of fighting. And the truth is spoken by Hakurei Reimu. An epic story of change in flowers and falseness begins!