Ai, a regular girl with a passion for dance, admires her friend Machi, a gifted dancer whose talent outshines her own. However, Ai's admiration turns to concern when she uncovers Machi's hidden secret: the Aguu, mystical beings that bestow extraordinary abilities on their bearers. Discovering that Machi has turned into a Seamstress, a creator of Aguu, Ai steps up as a Savior, joining a long line of warriors dedicated to opposing the Seamstresses in a timeless conflict.