The sense of an ending

Tony Webster has always made the very reasonable assumption that he could trust his memories, but when he's forced to revisit his past, everything he believes about himself and his life is challenged. The fact is that Tony Webster, a middle-aged man, never gave much thought to his past at all until his closest childhood friends' return with a vengeance -- one of them from the grave and another maddeningly present. Tony thought he'd left all this...