It's the last leg of the McGrath's trip, and Jody is really looking forward to visiting the Venezuelan rainforest with her family, Brittany and Dr Taylor. They're travelling along the tropical river in search of the beautiful and elusive boto dolphin - the rarest dolphin in the world! Jody is determined to catch sight of the amazing salmon-pink boto, but the heat, and Brittany, are getting to her . . . Surviving a night in the forest, overrun by ants, Jody feels she can survive anything, if only she could actually get to see the boto . . . Just as she's giving up hope, Jody finally gets to meet one of these fabulous dolphins, but she and her new friend, Juan, have to rescue it first. Will they get to the dolphin in time to save her?