A musician who is supposed to mend his ways ends up changing the habits of a group of fellow inmates in this comedy. Wesley Benfield (William Lee Scott) is a guitar player with a habit of walking on the wrong side of the law. One night, Benfield gets into a fistfight in a Missouri honky-tonk, and when police discover the car he drove to the club is stolen, it's not long before he finds himself standing before a judge. Benfield is ordered to move into a half-way house near a small Baptist college, and as part of his therapy he joins in a small gospel combo comprised of the house's residents. However, Benfield is a lot more interested in playing the blues; with a bit of persuading, he convinces his bandmates to pursue a new musical direction, and they start sneaking out at night to play shows at a local nightspot. Killer Diller co-stars Fred Willard, Lucas Black, John Michael Higgins, Mary Kay Place, and veteran blues artist Taj Mahal.