Mona and Robert arrive at a Bluegrass farm for a private horse auction. While Robert attends the auction, Mona wanders the stables, where she discovers a groom striking an agitated horse with a riding crop. She immediately confronts the groom and grabs the horse’s halter, ordering the man away. After calming the Thoroughbred, Mona leads it back to an open stall only to discover a man trampled to death and partially covered with straw. Did the horse kill the victim, or was the horse framed to be the culprit? Mona inspects the scene and questions the horse’s culpability. It’s imperative that she find that groom!