Judith and Jeremy have loaned their boat to a group of marinebiologists. While diving, Gary, one of the experts,discovers a rare gold coin and pockets it, but tragedy soonstrikes when he goes into cardiac arrest in the water. Caronshows Jean the treasure and enlists her help to investigate thedeath. Was this team of scientists really combing the seabedfor minerals or could something else have led to Gary'sdemise?
