Las Vegas is one of America's top tourist destinations, but it's Sin City's seedy underworld - which visitors rarely see - that is explored in this two-part series. Journalist Trevor McDonald uncovers the secrets of the Nevada city, which grew from nothing to being a haven for shady people. McDonald takes a look at the people who live in the shadows of Vegas - some who have won big and others who have lost big - who have one thing in common: they'd likely be better off living somewhere away from the neon lights of Vegas.