When Pauline Edmunds agrees to accompany her workmate Shirley on a Caribbean cruise, she is disappointed to be left alone almost at the start when Shirley starts a holiday romance with Joe Collins, a guitarist in a band working on board the ship. However, Pauline does not like the look of Joe, and tries to dissuade Shirley from continuing the affair. When Shirley cannot be found one morning, Pauline begins to investigate her friend’s disappearance, opening up a whole can of worms amidst a background of Caribbean scenery and sunshine.
