3rd OCTAVE F is a daring and stylized opera-western that tells the story of a broken family, revenge and standing up against injustice towards women. As Mario, a bit short-fused but righteous outlaw, gets out of prison, his only wish is to get back home to his mother and sister Ada. It's not long until life drags him into trouble again. Witnessing a woman being attacked, Mario is forced to pull his gun on the perpetrator, leaving the man with just one hand. The Sheriff hears about Mario's deed and sets off to catch him. The Sheriff couldn't care less for the woman attacked or the man whose hand Mario just shot off. He wants Mario in order to avenge his father once and for all. At home, Ada gets the word that Mario is on the train on his way home with the Sheriff after him. Ada must act quickly to get Mario off that train before the Sheriff does. Luckily, she has a motorcycle and her voice to help her. Can Ada reach the right note to stop a train and disarm even the most brutal of men?