Last year, Sheriff Jamey Noel devised a programme to root out crime and corruption in Clark County Jail, Indiana, by sending volunteers inside as undercover inmates. Now he continues his unprecedented programme and sends in a new group of eight undercover inmates to gain a unique perspective on what is going on in the facility, including investigating how drugs and contraband are getting in. Tonight, former corrections officer Sheri, ex-army reserve medic Ryan, retired police officer Quintin, and Monalisa, whose own daughter is incarcerated, are the first four participants to enter the jail.