Tír na nÓg, the "Otherworld", is home to the creatures of dreams and nightmares. From the Fae of the North and South to the vampires of the West, there is only one place where they can all be found: Ildathach, an academy for the children of all races.

Even amongst the Fae, Ashlyn Kim is an anomaly. Both Winter and Summer are her birthright, and iron courses through her veins. Many thirst after her blood, and would go to any means to obtain her for their own purposes. After 12 years of living amongst the vampires, Ashlyn finds herself a student at Ildathach. There, Ashlyn befriends the Unseelie Prince Jungkook, earns the ire of his older brother, Taehyung, and comes to face with old friends and enemies alike. Meanwhile,  in Tír na  nÓg, things are beginning to stir and the darkness finds its way to Ildathach. Ashlyn is ready to face Tír na nÓg again but, is Tír na nÓg ready for Ashlyn Kim?