When sixteen-year-old twins Emma and Evin LeFay are suddenly forced to pack their belongings after the tragic murder of their mother, they soon find that the busy city life of Boston, Massachusetts is more than they could have expected.

First are the two mysterious boys that Emma crosses paths with one night, after being caught in the wrong place at the wrong time. She thought she escaped them without getting caught, but it soon becomes apparent to her and Evin after a series of strange events that someone—or rather, several people—seem to be following them.

It’s after a close-run in with a group of menacing creatures, and the sudden aid of the same strange people that have been following them that Emma and Evin quickly realize there is more to Boston than skyscrapers and noisy cars.

Left with no other options and seeking the truth behind their mother’s murder, Emma and Evin accompany their saviors to a place known as Hawthorne Academy. It’s here that the twins soon learn they are part of a supernatural race with rare abilities, known as Dracons, one Otherworld race amongst four other paranormal races that have lived in disguise as humans for centuries.

Being part of an Otherworld race has its drawbacks, however, when Emma and Evin are enrolled for training at Hawthorne after a heated meeting with the Otherworld Council and its leaders. It’s either sink or swim for these Otherworldly twins as they train at the academy and learn to control their unique gifts.

Convinced life couldn't get much more bizarre, Emma and Evin discover a mysterious archway leading to an entirely different realm that has been lost over time. It's in this Lost Realm and the Celestial kingdom of Evmurah that the twins are dubbed the Guardians of the Realms, protectors of both the Mortal and Immortal Realms.

It's Emma and Evin’s job to protect both realms from the darkness that taints them and the mysterious Precursor that seems to want them dead.