Equestria's most notorious musical group, The Pony League, makes a stop in Ponyville on their mayhem-filled, Equestria-wide tour. They blow out speakers, scream for political revolution, throw out obscene gestures, squeal feedback throughout the town square, and smash instruments just inches from ponies' faces. And that's just the first song. Most horses feel shocked and horrified by their sound, their ideology, and their callous attitude. Yet Twilight finds them utterly fascinating, and she takes them on as a sort of psychological science project.

Her friends think Twilight has truly lost it. She also fears that Princess Celestia will not take very kindly to a group ranting about her "tyrannical rule". Yet something about them and their handsome lead singer, Ian, touches Twilight's heart as well as her mind.

Musical inspirations include Ramones, Sex Pistols, Misfits, Joy Division, G.G. Allin, the Tubes, Missing Persons, the Human League, the Smiths, the Jesus and Mary Chain, Gary Numan... and many other socially transgressive punk / post-punk groups.