The story is about a music teacher who loved dogs. He lived with his wife and they had a daughter. The professor travelled to college by train every day and returned home at 5pm. One day he saw a dog in the street and didn't know what to do because the dog was lost. He looked at the dog's collar and read his name: Hachiko. He took it home but didn't tell his wife because she didn't want any more dogs at home. Little by little the professor and the dog became very close friends and finally the dog stayed at home with all the family.
Every day the professor and Hachi walked to the railway station and then Hachi returned home by himself. Time passed and everybody at the railway station knew Hachi and the great loveprofessor felt for him and how devoted the dog was.