Abandoned as a toddler, Sydney Rose has spent years wondering who she really is, homesick for a life she's never lived. When a private investigator crashes into her world, she finds herself heading to a tiny seaside town in Maine to meet a woman named Maggie, who's searching for the granddaughter she lost decades ago.

If not for Maggie, Neil MacKean might still be back in Scotland, bereft and alone. Instead, he has a full life in Muir Harbor with an adopted family he loves and a blueberry farm to run. But the farm is struggling and strange occurrences have him concerned. Worse, Maggie's once again caught up in the past, convinced she's finally found her long-lost granddaughter.

Worried for Maggie, Neil is suspicious of the city girl who shows up at the farm. But there's something about Sydney that tugs on him, drawing out secrets he never meant to share. While Neil grapples with the future of the farm, Sydney wrestles with a past that's messier than ever. Together, they're pulled into a mystery complete with a centuries-old legend, unexpected danger . . . and a love as deep and wild as the sea.