When a group of eighth graders finds a buried treasure chest with a map inside leading to lost treasure, they set out into the ocean depths to retrieve it. Along the way, they encounter sharks and a malevolent giant octopus they must do battle with. Eventually, they come upon the shipwreck holding the treasure and Black Beard's ghost who commands a shipload of skeletons defending it. As the underwater battle ensues, the suspense rises with lively chaotic action. This is the one disastrous treasure hunt you won't want to miss.