Cadence has grown up in a wealthy family that never talks about any of the bad parts of life. Every summer her mother’s family comes together on their private island and, with her group of friends, she has the most amazing summers. But one summer, everything goes wrong. Cadence can’t remember exactly what happens but she isn’t allowed back to the island and everyone in her family is treating her differently. When she returns to the island after some time away she will uncover the events that took place during summer 15.