Kai sees her life as a series of concentric circles-her twin brother Kade occupying the center sphere with her, their parents surrounding them in the next, and the Tyler family in the outer loop, a connection Kai plans to make official by someday marrying Josh Tyler. The Martins and Tylers share memorable times together, but under the surface, they are two dysfunctional families struggling with alcoholism, depression, and abuse, all of which leads to a horrifying event that knocks Kai off her axis and makes her doubt everything she thought she knew.
Josh is there through it all, and Kai eventually gets the romance she dreamed of, embarking on a life of travel and adventure with the boy she always loved. Yet reality is more complicated than any childhood fantasy, and when painful family patterns are reenacted between them, Kai must decide how much of herself she is willing to sacrifice for Josh.
Ultimately, Kai must confront the heartbreaking truth that as much as we try to help the people we love, we can only truly save ourselves.