When Celia Krügerner visits her Uncle Dieter's castle in Switzerland for his annual summer ball, she's excited to learn that Erin, who she shared an unforgettable dance with the year before, will once again be attending. Although their exchange was brief, Celia's been unable to stop thinking about the dark and mysterious woman, and she's determined to make a lasting impression on her this time.

Erin Nour, superyacht designer and avid traveler, has sailed from Bermuda to attend her good friend Dieter's ball and has donated a vacation on The Barracuda – her pride and joy – to the charity auction held during the event. The long journey was worth it, as she's not only looking forward to celebrating his recovery from recent ill health but also to seeing his favorite niece, Celia, again.

When Dieter places the winning bid, he invites Erin, Celia, and his love interest Andy to join him on the yacht. Erin soon finds out that this will be his last voyage and, honoring his wishes, she promises to keep the severity of his illness to herself. They embark on a life-altering journey together, but with secrets between them, can love prevail?