Sally Combs had just finished a temporary job as a secretary to her uncle in Bermuda. As a farewell present he arranged for her to go on a cruise round the Caribbean. It seemed an ideal holiday, but the night before the ship arrived in Bermuda, Felicity Fennister, one of the passengers, suddenly disappeared. At first no one seemed at all anxious to discover the whereabouts of the missing woman - not even when Sally finds what looks like a suicide note. As sinister events build up into a pattern of violence, Sally is forced to realise that almost anyone on board could hold the key to the puzzle.