A father learns that his son Gabriel, who ran away from home twenty years ago, is now suffering from a brain tumor that is causing severe damage to his brain. When the tumor is removed, doctors find that Gabriel possesses anterograde amnesia. It is discovered that while Gabriel is not able to form new memories on his own, he is able to do so with the help of music. As Gabriel's father attempts to reconnect with him, he finds that he must not only cope with Gabriel's illness, but also confront the very issues that led to their separation.