Ippo Makunouchi was an extremely shy high school student who never had the time to make friends because he was always busy helping his mother run their family fishing charter business. Because he kept to himself, a group of bullies led by Umezawa got into the habit of picking on him. One day, these bullies gave him a rather serious beating. A middle-weight professional boxer who was passing by stopped the bullies and took the injured Ippo to the Kamogawa Gym (鴨川ボクシングジム Kamogawa Bokushingu Jimu?), owned by retired boxer Genji Kamogawa, to treat his wounds. After Ippo awoke to the sounds of boxers training, the boxer who saved him, Mamoru Takamura, tried to cheer Ippo up by letting him vent his frustrations on a sandbag. It was then that they had their first glimpse into Ippo's talent for boxing. After that incident, Ippo gave the situation a lot of thought and decided that he would like to begin a career as a professional boxer...