While far from idyllic, life for residents is relatively uneventful; that is until the mystical barrier protecting it is breached by an outsider harboring an obsession with the supernatural realm, bringing chaos to both Gensokyo and the world beyond. It’s up to shrine maiden Reimu and her magician friend Marisa to uncover the true source of the chaos and restore peace to both worlds, dodging magical bullet barrages and battling a menagerie of mystical creatures along the way!