Dr. Robert Hart, Sag Harbor’s just-named Man of the Year, is the envy of his friends and neighbors. His medical practice is thriving. He has a beautiful old house, a beautiful new wife and a beautiful boat docked in the village marina. Even his wayward son, Jonah, is back on track, doing well at school, finally worthy of his father’s attentions. So when Jonah’s troubled college roommate needs a place to stay for the summer, Robert and his wife generously offer him their guest house. But when Robert suspects his new houseguest of getting a little too close to his wife, the good doctor’s veneer begins to crack. Before long, Robert is embroiled in a desperate downward spiral, threatening to destroy anyone who stands in his way.