Taecyeon, Tiffany, and Nichkhun are teenage humans with extraordinary gifts - gifts that are "not-of-this-earth". They are human/alien hybrids, sent here to complete their destiny. What will happen when one of them risks exposing the others through a heroic act to save a human? In the attempt of saving Yoona's life, Taecyeon forever changes the lives of remaining members of his race. Will they ever by able to get their lives back to 'normal'?