Sienna Cate

Sarah, 12, lives on a boat with her parents, who research whale sharks. Her only friend is a whale shark named Jack, who Sarah rescued when he was a pup. But following a tragic accident, mum and Sarah move to the coastal town of Exmouth. Desperate to return to her old life, Sarah pegs all her hopes on Jack, certain that when his migration brings him back to Exmouth, mum will take her out on the boat again. But Jack fails to return, so Sarah embarks on a risky mission to find him.

After spending a night asleep in a high-powered radio telescope dish, Jack acquires a unique skill of being able to transmit all types of radio waves in his mind. Prior to this incident Jack is having a bad run, he has just broken up with his girlfriend, lost his job and has no money and is about to be kicked out of his house.