Hachiko (Forest) is a mysterious dog because no one knows where it comes from. Professor Parker (Richard Gere) picked up a lost puppy at the train station in the town. It seems that the puppy and Professor Parker are destined to have some kind of fate. Once Parker picked up the puppy, he could not put it down. In the end, Parker's love for the puppy Hachiko influenced his wife Carter (Joan Allen), who was initially opposed to raising a dog. Hachiko grew up slowly under Parker's care. When Parker was at work, Hachiko would always send him to the station. When he got off work, Hachiko would also crawl to the station early to wait. Hachiko's loyalty made the people in the town love him even more. One day, Hachiko behaved abnormally when Parker was about to go to work. He actually played a ball-picking game that he had never played before. Hachiko's performance made Parker very satisfied, but on that day, Parker died of illness. Parker's wife, daughter Andy (Sarah Roemer) and son-in-law Michael (Robbie Sublett) buried Parker with a very sad heart, but Hachiko, who didn't know the truth, still waited in front of the door of the station at five o'clock every evening, waiting for his master to return... This film is adapted from a true story that happened in Japan in the 1930s. After being made into a movie in Japan in 1987, it created a box office of 4 billion yen.