Tempest Winters thought that this summer would be just like any other: tanning on the beach, hanging out with her favorite people, and avoiding any and all summer reading projects. But then on a beautiful sunny day, her cousin disappears under the ocean waves and emerges with seemingly unexplainable powers. Later, Tempest meets a gorgeous stranger who hides a dark secret and soon after, everything changes as she, Astrid, Amber, and Devon embark on a quest to save their hearts, their families, and the world as they know it.