Amusia.

In a world saturated with music, a girl who is born without the means to hear it. The disease is called Amusia. It exists but nobody knows about it and it tortures her but nobody believes it. She had a lonely childhood which she spent defending herself from accusations and prejudice. The disease, and lack of acceptance, push her to run away, finding herself in a forgotten suburban neighbourhood. There she befriends a boy who is fighting his own solitude through music as he tries to prevent his own dreams from rotting away.