In pre-World War II Germany, swing music becomes the underground movement of young people. Two high school students, Peter Müller (Robert Sean Leonard) and Thomas Berger (Christian Bale), attempt to be swing kids by night and Hitler Youth by day. The impact of this decision is felt acutely by their friends and families. Soon dancing and fun lead to more difficult choices as the Nazis begin tightening their grip on Germany. A seemingly charming but intimidating Gestapo officer, SS-Sturmbannführer Knopp (Kenneth Branagh, in an uncredited role), insinuates himself into their lives. Each member of the group is forced to face difficult choices about right, wrong and survival. This is the story of one group of Swing Kids, and how Nazi rule and persuasion tore them apart and set them against each