By the end of the millennium, thousands of homeless people roamed the streets of Manhattan. A small group of them went underground. Invisible to society, they managed to start a new life in the tunnel systems of the city. Acclaimed war photographer Voeten gained unprecedented access to this netherworld, where he lived for five months, meeting Vietnam veterans, macro-biotic hippies, crack addicts, Cuban refugees and runaways. 13 years later, Voeten tracks down the original tunnel dwellers - now evicted - to discover what happened since they left the tunnels.