Three girls in 1980s Stockholm decide to form a punk band — despite not having any instruments and being told by everyone that punk is dead.

11-year-old Astrid wants to do things her way, but her mother thinks she is too young. Astrid rebels and slips away for an afternoon in town with her friends. High on freedom, she ends up out of her depth, and as the day draws to a close she has a problem she needs to deal with.