There are three types of Kingdoms, one in the sky, one on land, and one in the ocean. The people of the sky and the people of the water despise each other, and the humans are caught in between them. So what happens when a woman from a sky kingdom, and a man from an ocean kingdom fall in love? Kalliope didn't know why her parents never let her outside, she never knew why she looked so different compared to everyone else. Then her parents died and her whole world came crashing down on her. Now it is just her and her brother hiding to keep her safe, but what happens when Kalliope can no longer hide and must show herself to change the world she lives in.

Opal has no memory of who she is, or where she came from. Her life is as much a mystery to her as it is to the people around her. As she begins a new life in a new place, she discovers dark secrets about herself as images from her past flash through her mind. She possesses inhuman abilities, and is being hunted by the only person that seems to know who she rely is.