Beneath the bright lights of the Las Vegas Strip lies a system of underground flash flood tunnels. Dark and dangerous, these tunnels house an untold number of the city’s homeless. Dr. Phil’s guests say their mom, Cindy, is one of them, and they want her out. Amber, Ashley, Angela and Atisha confide that Cindy, who is addicted to drugs and alcohol, lost custody of them when they were small children, and they’ve had sporadic contact with her ever since. Angela says she even ventured into the tunnels to get her mom, but Cindy wouldn’t leave – refusing to be a burden on her children or leave her husband, Rick. Dr. Phil sends professional locator Troy Dunn, along with Matt O’Brien, author of Beneath the Neon: Life and Death in the Tunnels of Las Vegas to find Cindy and Rick. Watch Troy and Matt navigate through this hidden underground society.