Kennedy Ryan and Brooke Nicholas have circled around one another for years without getting to know one another, but getting stuck together during a post-college trip is going to change that. A growing friendship, an abandoned puppy, and no one to act as a buffer between them will upend a lot of ideas they had about one another. Kennedy finally realizes she may have only scratched the surface where Brooke is concerned, and Brooke is terrified that she's falling in love with her best friend.

Olivia Carver's life in Lake Cabot, New York, is simple. That's how she likes it, even if she can't stop the town she loves from being overrun by wealthy tourists each summer. When she's not working at her family's paddleboard shop or spending time with her lovable but infuriating brothers, she puts her energy into writing professionally, a dream that has yet to materialize. 

Nadia Keating has barely started her cardiothoracic fellowship training, but she already has the archetype nailed - she's direct, uncompromising, and suffering from a God complex. Before she can focus on her impressive research, deeply closeted Nadia has a personal project: getting her inconvenient attraction to women out of her system. She picks a stranger online for a one-night stand. Ashley Rylan, the chief of Nadia's department, is her polar opposite - sweet, agreeable, and soft-spoken - and the stranger Nadia unwittingly chooses. 

Avery Weston is doing fine. Sure, she’s not doing as fine as her ex - award-winning actress and current television it girl Elise Hayes - but Avery enjoys her work as a federal air marshal and also enjoys almost being over Elise walking out on their relationship 15 months ago. Then Elise is seated next to her on a flight, and the emotional progress Avery thought she’d made is reset in an instant.

The chronically shy Erin flees University is not for her and blunders into a foreign student from Italy. Gianna is confident, sassy and eccentric, everything Erin's not, and for some reason, she's taking the timid girl under her wing. It should never have happened, they were so different, yet unexpectedly, they fall in love. Then Gianna disappears. When fate repeatedly conspires to remind Erin of her lost love, she must decide whether to risk destroying everything she's built to find her.