Sea Secrets

I couldn't see why finding a few abalone in a bag was dangerous, I mean, how valuable could they be? It seemed a lot of fuss about nothing to me. Then Tran Nguyen went missing...When Zena and her friends try to find Tran they end up in much deeper water than they expected...Beneath the sea there are dangerous secrets, and this summer at Portside holds more excitement than swimming, snorkelling and jet-ski riding.