Parasailing Predicament

Gran asks Jenna to go to the beach with her, and books a surprise adventure for them both - a parasailing ride. Jenna's mum is not happy about it, and Gran's friends are just a little concerned, too. But what could go wrong? Find out what happens to Jenna and Gran when there's a small problem with the boat that tows them. Who will come to their rescue and how will they get back to dry land?