The musician Laurie Amat has heard a conspiracy theory involving Joseph Goebbels and the Nazis. Supposedly, on an international conference in 1939, the Nazis managed to change the music tuning globally. They changed the frequency to 440 Hertz. They did it because they thought it would make the masses aggressive and easier to manipulate. This is the music pitch we listen to today. Driven by her worry Laurie is thrown on a larger adventure into the unknown universe of sound. During the journey we meet passionate and charismatic sound enthusiasts. They reveal what sound really means to them personally and what it can do to you. Laurie experiences how sound can heal, how sound can manipulate your feelings and push you to do something, and how sound can be used as weapon. Is it possible that second world war Nazis knew about this? During the exploration into sound Laurie brings in her own thoughts and personal memories around sound, - anecdotes and humor where you never know which sound is waiting around the next corner.