Seventeen-year-old Ian is the heir of a magical family that has been guarding the human world from demons for several hundred years. He had been preparing for his mission since birth, but the death of his parents and a changing world in which guards were no longer needed put an end to his plans. However, those born as hunters will never give up service. Demon collaborators no longer hide behind the Veil, but wear the clothes of high-born families? So much the worse for them. He is Jan Essen. And his job is to destroy the servants of Hell.