An earthquake in the depths of the Caribbean Sea shakes the little island of Grand Cayman, revealing sinkholes in the roads - and ghosts from the past. When AJ Bailey discovers a long hidden cavern in the reef, she may have found clues to a 34-year-old unsolved mystery tied to lost relics from the old world. Tales of a famous 16th century explorer and treasure hunters from the 1980's all collide in AJ Bailey's undersea world on Grand Cayman, in book eight of the thrilling series.