After the stress of working in a busy Chicago ER, Sage Brady reinvented herself and enjoys her job as a doctor on a cruise ship. Until she takes over the position of Chief Medical Officer and learns the previous doctor was murdered. Then she discovers narcotics being smuggled through the ship's dispensary. But it's the hot detective assigned to the case that threatens her peace of mind most of all. Detective Dace Langdon hates his undercover assignment as a cruise ship security guard, but it's better than the vacation his boss suggested. Having the ship's captain assign the sexy Chief Medical Officer as his partner is a complication Dace doesn't need. Trapped on the open ocean, they race to find the identities of the smuggler and murderer before Sage becomes the next target. Will their attraction to each other complicate their investigation or lead to something lasting?