Thirteen-year-old Ben Daggett is looking forward to his summer job as first mate on a charter fishing boat on Martha's Vineyard. Then, on his first day out, he spots a strange object in the water -- a red Porsche. The driver is missing. Donny, an older teenager, knows something, but he's not telling. Donny has his own car, and Ben would give anything to hang out with him. But Donny's involved in something shady, and Ben finds out that the price of friendship may be more than he can afford to pay.