Sixteen-year- old Rose Mulligan's plan for the summer cruise with her grandparents is simple—read mysteries in the sunshine and see historical sites. It doesn't include joining a young people's tour group or crushing on a boy whose flirting runs hot and cold. And it definitely doesn't include being accused of theft. Sam Briggs also has a plan for the trip—hang out with his uncle and cousins, and avoid thinking about his stupid parents. But when family members pair-up with strangers, Sam is left wanting to hit something. The only bright spot is shy, constantly blushing Rose, a girl he really needs to avoid. She's too nice for a meaningless hookup. Then why can't he stop thinking about her? Determined to clear her name, Rose decides to find out who the real thief is. It quickly becomes clear that everyone has secrets. Dangerous secrets. But by the time Sam starts helping with the investigation, Rose is wishing she could forget the whole thing and just focus on his intense gaze and lopsided smile. There are only a few days left on the trip after all, and they'll never see each other again once it's over. Right? But it's too late. Danger has a way of finding you, whether it's disguised as a cunning thief or a swoony boy.