Arthur Dichter thinks he is dying from insomnia, but the reality is much more frightening. He wanders the streets, finding new ways to keep his body moving, even self-mutilation. Doctors think he may be suicidal. His wife, 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.