Lass and her six little puppies are lying near the kennel upon the suburban estate of Mr. Jameson, the wealthy New York broker. Mrs. Jameson, his wife, is walking about the estate accompanied by her six months’ old baby and its nurse. She stops and speaks kindly to Lass and her little family. Picking up one of the little dogs, she playfully puts it in the carriage with the baby and petting the little animal, returns it to its mother. She continues upon her walk. This same little puppy strays away from its little brothers and sisters and reaching the railroad tracks, it wanders into the next village, where it is met by a crowd of youngsters that are gathered about the station. They playfully abuse the little animal. Old Mr. Gladwin, who has a one horse cab and who depends upon the commuter for his livelihood, sees the boys ill-treating the dog and quickly rescues it. Finding that it belongs to no one he takes it home, first consulting his horse which shows that he approves of the dog’s intrusion into their home. The dog, now known as Shep, soon becomes fast friends with Mr. Gladwin and his horse, John, and the three are inseparable companions. Three years pass and a change has taken place in the hacking business, owing to the demand for automobiles. Gladwin finds it almost impossible to get a fare. He is soon reduced in circumstances and at times deprives himself of food. Before long he breaks down. One evening, while waiting for a train he faints while sitting on the box of his hack. During his following illness Shep is constantly at his bedside. He runs to the drug store and brings medicine for the man. On one of these trips he comes upon a child who has fallen on the track and is stunned. Unable to move her body and seeing the train in the distance, he runs madly towards it barking, causing the train to stop and the trainmen and passengers to alight to ascertain the reason of the barking. They follow him to the child. Mr. Jameson recognizes the little girl as his own and takes her home after inquiring about the dog and its master. The trainman knowing Shep gives him the information. He visits the old man and offers him medical aid and a position on the estate in reward for the dog’s act. Gladwin accepts on condition that he may take both dog and horse with him. Jameson consents to this and the three move upon the estate, where Shep, unknown to the household, meets his mother and the old horse is given a place in one of the best stalls of the barn. Mr. Gladwin is soon well and happy in his new position with his two animal friends.