To discover why a fellow DEA agent was murdered, Dex Adair is undercover at Kauai’s most beautiful resort. And when its owner, Katrina Sizemore, receives threatening letters, Dex wonders if her husband’s recent death could be connected. But uncovering an insidious conspiracy together means Dex and Katrina must put their fragile trust—and irresistible passion—on one deadly line…