Rusty had been absent from the country for over a decade - ever since he was indicted for securities fraud. No one expected him to show up on Nantucket that night. No one, that is, except his killer. Peter Mason, the bog's owner, seems less than moved by his brother's brutal death. The two men had been nursing a decade-old grudge over a woman. Could Peter have killed Rusty, or was Rusty attacked by mistake in the fog - when the killer thought he was Peter?