Will keeping his promise lead to another broken heart—or help them find love again? Professor Mikaela Rhoades has a plan: she’ll encourage her students’ marine biology research through an exclusive program while helping an old family friend’s whale touring business stay afloat. The challenge is the tour captain is her first love and ex-fiancé. Mikaela longs to help his family in the wake of his father’s death, but she’s keeping secrets. She’ll have to face her past and overcome her concerns about the future to make it through the summer. Captain Hunter Cahill has taken over the family touring business after his father’s death. Unfortunately, he’s drowning in grief and accumulated debt. He’s hoping the incoming stodgy professor will help resurrect the failing business, but he’s not prepared when that professor turns out to be Mikaela, his former fiancée. To make matters more difficult, he’d promised his father to pursue her if she ever returned to the island single. The more time they spend together, the easier it is to keep that promise, though she still plans to leave at the end of the season. How much will it cost him to spend the summer romancing Mikaela?