Offering shelter for the summer to his son's troubled college roommate, Dr. Robert Hart, who has just been named Sag Harbor's Man of the Year, reveals a dark inner nature when he develops paranoid suspicions about his wife's fidelity.

Dr. Robert Hart, was just named Sag Harbor's Man of the Year, His medical practice is thriving. He has a beautiful old house and a beautiful new wife and a beautiful boat docked in the village marina. Even his wayward son, Jonah, is doing well at school, finally worthy of his father's attentions. So when Jonah’s troubled college roommate, Nick, needs a place to stay for the summer, Hart and his wife generously offer him their guest house. But the houseguest is getting a little too close to Hart's wife. Little lies begin to mount. And now Hart is embroiled in a desperate downward spiral, destroying the lives that stand in his way. -- adapted from jacket