Imagine if all the creatures of myth and legend were real. What if fairies, trolls, Bigfoot, and the Loch Ness Monster secretly inhabit the earth right alongside humans? This is the world of 15-year-old Callie Cooper, a Hunter working for the Organization for the Research, Investigation, and Overseeing of the Neo-mythical (O.R.I.O.N.). This top-secret organization is charged with the task of maintaining the delicate balance between Neos (creatures of myth) and humans. The Hunters of O.R.I.O.N. investigate strange happenings among these fantastic and potentially dangerous creatures, only interfering when the safety of Neos or humans is at risk. Under the supervision of her Mentor and uncle, Liam, Callie is finishing her time as a Rook and is looking forward to reaching Chaser status. With graduation quickly approaching, Callie is under great pressure to complete all of her requirements for promotion and make her uncle proud. Everything in Callie's life changes on the night a strange, deadly Neo nearly escapes the base. Callie has a brief yet frightful encounter with the creature who tells her he has information she desperately wants – information about the death of her parents. Through a series of unusual circumstances, Callie discovers that the only life she's ever known may not be as safe and genuine as she once believed. Callie is forced to make decisions that will forever alter her destiny and her relationships with others.