Jazz musician Bill Pullman is an already insane guy in a failed marriage; bitter at his wife's infidelity he murders her and is captured and sentenced. Unable to cope with this reality he invents an alter ego, but this alter ego has to cope with his emotions and his life starts to fall apart. A bit like a voyage into Hitchcock's Psycho's head. Probably Lynch's most baffling film up to this point, and well worth watching. Just bear in mind that most people, eg non-Lynch afficinados, will not attempt to understand it and hence will hate it. For some ideas try here www.jasonsweb.com/LostHighway. Should help you on the road to smug cinephile pedantry...