Kate, the daughter of a lawyer and marine biologist, has just moved to a small beach town in Florida. She's forced to start over in the middle of the summer, but is used to it by now, since she's moved around her entire life. When Kate meets Rico and Adriana on her second day at the beach house, everything changes. Kate is introduced to the world of Light and Darkness, and is thrown into the middle of it when a mysterious being attacks her one night. As Kate's nights continue to get weirder, her friendship with Rico and Adriana grows stronger, and for the first time Kate has real friends....

Kate and her mother, Blaire, are forced to pick up the pieces after her father's death. However, the pair is finding it hard to get along, and their constant arguments tear the already fragile relationship between them. On top of that, Rico leaves to find answers to questions about his humanity, and Kate is left alone with her mother. When Kate can't handle the chaos of their relationship any longer, she finds happiness in new friends. These friends turn out to be more important than Kate could have ever imagined, and when visions of magical keys bring more questions, Rico is forced to alter...

Kate's talisman has been stolen, and she must now face her deepest fear: fear itself. Nevertheless, Kate is trying to live a normal life; she's going on dates with Rico and hanging out with her friends. She's still searching for ways to give Rico his humanity. She's anxious about starting school. But when Slade comes back, things begin to change. Kate's visions begin to show her things that prompt more questions, and when she searches for answers, she entices another demon to hunt her down. Then, on top of everything else, Kate finds out that she is a part of a prophecy, one that will bring...