It's wedding season on Nantucket, and two unwelcome guests are crashing the party... When people begin disappearing from the island, Nantucket Police Chief Henry Kennis is baffled. The victims are not random--they're all Nantucket High School alumni. And the only clues left behind are pennies dropped at the sites of the kidnappings. There's an old island tradition of tossing a penny from the ferry as you depart to ensure...