Cinders, the furnace man in a large tenement building, has no friends, with the exception of his dog, Mutt, and Katy. a poor little girl. One day Mutt is away for a long time. When he comes back he brings with him a note from little Katy, saying that she is sick in bed. Cinders goes up and she tells him that she would like some real flowers instead of the artificial geraniums that form her only garden. When he goes to buy them he finds that he has not enough money and decides to sell his dog. After speaking to several men he at last finds a purchaser, who pays him a dollar. Cinders spends the money on flowers and takes them to Katy. A few minutes later, a man comes in bringing Mutt with him. He is the man who had bought the dog and is none other than Katy’s father, who had long been missing.