A lot of things are not allowed through the doors of Wisconsin’s prisons. Cell phones are banned and even underwire from a bra is considered a possible weapon. But recently, a group of musicians was allowed to venture inside a Wisconsin lock-up with a piano, violin and cello in tow. WPR’s Sarah Lehr brings us this story of “Concerts for Hope,” a show that took place inside the walls of Oshkosh Correctional Institution.