Skylar Connelly wants to know what happened to her sister, Maia, who vanished without a trace in the Florida Keys. Unwilling to accept the authorities' dismissal of the case, she conceals her relationship to the missing girl and takes a position at Casa del Mar, a magnificent, seaside estate owned by Martin Escalle, a slick entrepreneur whose business interests, she suspects, include illegal activities.

Luke White, the captain of the yacht named Calypso and Escalle's right hand man, challenges and fascinates her with his combination of surfer good looks, bad boy charm, and stiletto sharp mind, but is he also a killer? Dare she trust him? Her heart and soul will accept no less.