It's Nantucket wedding season, also known as summer-the sight of a bride racing down Main Street is as common as the sun setting at Madaket Beach. The Otis-Winbury wedding promises to be an event to remember: the groom's wealthy parents have spared no expense to host a lavish ceremony at their oceanfront estate. But it's going to be memorable for all the wrong reasons after tragedy strikes: a body is discovered in Nantucket Harbor just hours before...