Troublesome teen sisters Sahara and Crystal Nichols are acting up and their risque behaviour is more than their mother Lenora can handle. Enter the girls' 75-year-old grandmother, Ma Ray, who agrees to take charge. She's determined to turn their lives around - and knows more about being a bad girl than either sister bargained for. Now this churchgoing woman with a mysterious past is going to steer her two reckless granddaughters away from trouble with her smarts, her savvy - and the Word of God.