Some call them simply immortals, others - demons, others - spirits or devas. They themselves prefer the name “primus,” which means “first” in Latin. When Ariana is attacked by a mysterious stranger, whose will everyone around her suddenly begins to obey, the girl’s life changes forever. Ariana learns that the lyceum where she studies is run by the secret organization “Pleiad”. She controls the Primus and protects humanity from them for many centuries. But it seems that Ariana herself has a special power. And in order to escape from the one who is hunting her, the girl will have to use the help of the demon himself...