From New York Times bestselling author Jill Shalvis comes a friends-to-frenemies-to-sisters story… And then add in a love story (okay, two love stories). Shake. Stir. Read on a lazy summer day at the beach.

Brynn Turner desperately wishes she had it together, but her personal life is like a ping-pong match that's left her scared and hurt after so many attempts to get it right. In search of a place to lick her wounds and get a fresh start, she heads back home to Wildstone.

And then there's Kinsey Davis, who after battling serious health issues her entire twenty-nine years of life, is tired of hoping for . . . well, anything. She's fierce, tough, and pretty much the opposite of Brynn except for one thing: they're half-sisters. Kinsey is keeping this bombshell, and a few others as well. Long time frenemies from summer camp, there's no way she's going to tell Brynn they're related.

But then Brynn runs into Kinsey's lifelong best friend, Eli, renewing a childhood crush. He's still easy-going and funny and sexy as hell. When he gets her to agree to a summer-time deal to trust him to do right by her, no matter what, she never dreams it'll result in finding a piece of herself she didn't even know was missing. She could have a sister, love, and a future-if she can only learn to let go of the past.

As the long days of summer wind down, the three of them must discover if forgiveness is enough to grasp the unconditional love that's right in front of them.