Inspired by writer Sunita Balsara's experience with tinnitus, Ostinato follows Nuha, a composer who sees the world as a vibrant soundscape. She is having the best and gentlest kind of morning when her playing is interrupted by a mysterious Tone. As she struggles to confine and banish it, the Tone grows larger and louder, drowning out her music. Only when Nuha stops fighting does she discover a way to incorporate the Tone into her music and life.