Jody McGrath's dolphin dreams are coming true! Her whole family is sailing around the world researching dolphins - and Jody is recording all their exciting adventures in her diary! While visiting the Canary Islands, Jody is thrilled to see the largest dolphin species in the world! But all is not well in this island paradise. Jody discovers that the dolphins are at risk of being injured by speeding ferries that link the islands. Helping these dolphins might prove to be Jody's biggest challenge yet!