Music accompanies the path of the human metronome, the prodigious pianist Kousei Arima. But after the passing of his mother, Saki Arima, Kousei falls into a downward spiral, rendering him unable to hear the sound of his own piano. Two years later, Kousei still avoids the piano, leaving behind his admirers and rivals, and lives a colorless life alongside his friends Tsubaki Sawabe and Ryouta Watari. However, everything changes when he meets a beautiful violinist, Kaori Miyazono, who stirs up his world and sets him on a journey to face music again.