Two architects, two men turning forty who have been involved professionally and personally for twenty years, are beginning to see their practice and their marriage falter. One Fall day, a peculiar young man drifts into their storefront office claiming he has car trouble, asking to use the phone. The men get to talking; the young stranger is curious but enchanting, and one of the architects ends up playing tennis with him that afternoon, ultimately inviting him home for dinner. The ensuing evening involves a lot of wine and banter and then increasingly dark conversation, and when the stranger has had too much to drink, the two men insist he sleep in their guest room. During the night, the stranger commits an act of violence which shatters the architects' ordered lives, each man in his own way over the days and months that follow coping with blossoming doubt and corrosive secrets.