It's 1964. People in the resort town of Pine Lake, Wisconsin are unnerved when a stranger is found unconscious in the park. He's taken to the hospital with severe head injuries and subsequently slips into a coma. All efforts to identify him fail. A young nurse is enamored with the sleeping stranger. Waking only complicates matter when the man has no memory of who he is or what happened to him. Together, he and the nurse journey across the state in search of his past.