Since his daughter grew up, the old repairman lived alone at home, and the only one who accompanied him was a little black dog raised by his daughter. After the daughter left, the old man became depressed, and every day he expected that his daughter would call and talk to him about recent situation, but more frequent calls were about the repair work outside. The old man became more and more silent. Even if he saw the dog trying to play with himself, he often can't lift his spirit. The days go by, until a strange thing happened in the house caught the old man's attention. He found that when he came back, the house was always messed up by the dog, and the telephone receiver was knocked over to the ground every time. He seemed to understand something, and he entered his cell phone number into the telephone, then removed all the buttons to leave only the redial button. Sure enough, when the old man went out again, he received a call from his home. After the call was connected, there was the dog’s excited gasp from the other end of the phone. The old man finally smiled with tears, and a warm stream rushed into his heart.