Jack is unhappy about leaving his old home and he doesn't think much of his new school. The one thing he does like about Cornwall is the sea - now he can go surfing every day if he wants to. When he sees a surfer in trouble by the rocks he goes to save him. But when he gets there, the boy has disappeared without a trace. Could it be the ghost of the dare-devil surfer who drowned there the previous summer? And, if so, what does he want?