In a world where ordinary people and unknowns, people with unique abilities and powers, not everything is as it seems. Macaria is part of the 60% of people in the city of Anecaster, who is not an unknown, or a person with some kind of magical power. Her life was nothing but ordinary until one night on her way home after meeting up with her friend, Natsuki, she spots a fight between a strange girl named Renley and three mysterious unkonwns. After accidentally becoming involved in their fight, Macaria meets Hoshiko, a wind spirit from another world who has lost most of his memories, who lends her his powers and changes her life forever. As Macaria tries to assist Hoshiko in regaining his memories, Shadow Dawn, an organization created by unknowns, creates, and releases the Phantom virus, a virus only infectious to unknowns, causing them to go on a rampage and attack anyone in sight. Now people are split, relationships are destroyed, and people question who they can trust. Macaria temporarily joins The Color Knights, a group created to put an end to Shadow Dawn and to find a cure for the Phantom virus. As she becomes friends with those within the group, she discovers a shocking secret about herself that could make everyone turn against her while Hoshiko learns what Shadow Dawn is truly after.