Commitment-phobe Nina Lejeune lives by two rules: 1. Always have fun. 2. Don't rely on anyone but yourself. The first rule is easy; the second, she's only broken once. 10 years after fleeing home, Nina is the chief stewardess on the super yacht Serendipity, single by choice, and content with her life. But her ex-coworker and old flame, Irish chef Ollie Dunne, isn't so happy with the status quo. He returns as the Serendipity's chef with an ultimatum: if Nina continues to deny she's in love with him by the end of this charter season, he'll return to Ireland for good. Nina and Ollie's shared secret from their past threatens to shipwreck not only their relationship, but the entire boat. But as their connection grows amidst chaotic guests and crew drama, could there be smooth sailing in their future?