Southern raised with a passion for mystery novels and stray animals, Ellie Moore is reeling. Her ex-husband remarried a woman who's everything she isn't - elegant and sophisticated - and the man she thought was "the one"? A scammer. When she wins a trip on the Senior Savers Cruise Line, she immediately packs her bags, ready for a change.

Having been nudged toward his golden years by forced retirement, introverted history teacher Mark Moore is given the worst gift ever: a trip on the Senior Savers Cruise Line. Booked by the nieces he raised as his own, Mark has no interest in going on the trip - but even less in hurting the girls’ feelings. He downloads dozens of books to his phone and plans to spend the cruise avoiding as many people as possible.

Sparks fly when the cruise line accidentally pairs Ellie in the same stateroom as Mark. He hates that she’s messy and loud, and she thinks he’s just like all other men – untrustworthy to his core. But when Mark reconnects with Gavin, a former student in trouble with the law, Ellie jumps at the chance to help with what feels like a real-life mystery novel.

While joining forces to help Gavin, Mark and Ellie’s feelings for one another move from enemies to friends to possibly more. Mark is having more fun in his seventies than he ever did in his younger years. And Ellie’s certain that she might have finally found a man she can trust. But just when it seems like love is on the horizon, Ellie uncovers concerning information about Mark. He’s not who seems. Did Ellie fall in love with the wrong man again? Or is there more to the story?