For the people that didn’t understand: There was a blind boy that apparently was a musical genius, he and his father were very poor so he couldn’t afford anything. But one day a man gave the blind boy a paper and told the boy that he he signed the paper he could have a chance to play music on the piano. The boy couldn’t read the paper because he was blind, but he signed it anyway. He got the eye surgery and became a famous pianist. It turns out the person who gave him eyes was his own dad, he sacrificed his eyes for his son to be happy. The deal cost his father’s life.