After a whole lifetime of being bad at love, JoJo Burton decides to solve her intimacy issues once and for all at her sister’s destination wedding on a cruise ship. With the help of a little pop psychology, she diagnoses herself with a fixation on the neighborhood guy who was her first crush and first kiss (and who just happens to be a newly-divorced wedding guest ), and she decides to woo him during the cruise for some long-delayed closure. Only problem is, her sister’s a little busy being a bride at the moment—so JoJo ropes in her childhood bestie, Cooper Watts, to be her wing man. Cooper: who RSVPed no, but then showed up, anyway. Cooper: who left town without a word four years earlier and moved to London. Cooper: who was, if she’s honest, the worst heartbreak of JoJo’s life. It’s bliss for her to see him again, and it’s agony, too—and the more they team up for Project Conquest, the more she obsesses over questions she can’t bring herself to ask.

Shipboard antics ensue in this witty, heart-tugging, childhood-friends-to-lovers romance—as JoJo and Cooper fake flirt, slow dance, share a cabin, sing duets, treat sunburns, get jealous, rescue each other over and over, and finally, at last, figure it all out in the most blissful, swoony, romantic way.