More than ten years ago, in a small town in the northwest, Erlang (played by Eddie Peng) who had just been released from prison returned to his hometown. Faced with prejudice and defense, he didn't know how to start a new life. After being forced to join the dog-beating team to make a living, Erlang saved a stray black dog. He also gained the courage to hit the road again in his interactions with the black dog. Life blooms more fiercely and powerfully in the dark. A man and a dog embrace each other's new life in mutual redemption.