Arthur Dichter thinks he's dying of insomnia, but the reality is much more frightening. He wanders the streets, finding new ways to keep his body moving, even self-mutilation. He has lost the ability to communicate, keeping a journal to express his private thoughts with no intention of sharing it with his wife Anna. His doctors wonder if he's suicidal. Anna denies it, knowing he is in a waking nightmare where delusions and reality become more and more indistinguishable. As his disease gives way to despair, loneliness and alienation, he and Anna hang on to their last shred of hope until the bitter end.