En route to the family’s summer holiday camp at Frigate Bay, Robert Cabriata reads a newspaper report that a shipwreck has been found at the front beach: could the wreck possibly be the fabled Mahogany Ship? Although the report turns out to be a red herring, the government puts up a reward of fifty thousand dollars to whoever finds the mysterious ship, and Frigate Bay, afloat with tourists, becomes gripped with treasure-hunting. Robert, swept along by this mystery, gets a spellbinding clue from the elderly campground caretaker, and determines that he will find the Mahogany Ship and claim the reward. But Robert is only thirteen, and finds himself battling a pirate, the peculiar Crabapple boys, and a town full of treasure-seekers. What’s more, he has to grapple with his sudden interest in girls, a body raging with hormones, and a world he’s unsure of.