Pianomania follows Stefan Knüpfer, a piano tuner from Steinway, and his famous clients Lang Lang, Brendel, Buchbinder, and Pierre-Laurent Aimard as they search for the perfect pitch. Juggling the demands of the pianist, the piano, and the piece requires boundless enthusiasm and endless patience. This documentary is a humorous and surprisingly suspenseful peek into the heated clash of wills between a genius craftsman and the renowned pianists who rely on his talent.