What happens when you combine a fake engagement, a salsa lesson, skinny dipping, and the opportunity to lean in and let go? The perfect sailing conditions for a full-blown Cruise Fling.

Andrea has her life perfectly planned — right down to the color-coded calendar that keeps her executive job at Pinnacle Cruise Line, her responsibilities as a single mom, and her sanity neatly in line. Romance? Chaos? Spontaneity? Those don’t fit between work responsibilities and devotion to her teenage daughter.

Thomas is a brilliant pediatric surgeon who’s used to making high-stakes decisions, but hesitates when a family cruise suddenly becomes a trip for two. After all, Thomas and Andrea are far from strangers, since their siblings are married, and Sunday dinners have become a regular gathering. And cruising with your sister-in-law’s sister feels…complicated.

What begins as a harmless escape with sun-soaked decks, endless ocean views, and a much-needed break from schedules and surgeries quickly turns into a week of witty banter, unexpected adventures, and sizzling chemistry that becomes part of the itinerary.

But every cruise eventually docks. Back on land, Andrea’s structured world and Thomas’s demanding career come rushing back, along with one unavoidable question: was what they found at sea just a perfect vacation fantasy or something real? Because some love stories refuse to stay neatly scheduled, and some connections are more than just a Cruise Fling.