Teenager Ippo Makunouchi, burdened with assisting his mother in their fishing business due to his father's absence, is a target for bullies due to his meek demeanor and exhausting lifestyle. Saved by boxer Mamoru Takamura, Ippo's hidden strength surfaces during a gym visit, leading to a surprising sparring match with boxing prodigy Ichirou Miyata. Under the guidance of coach Genji Kamogawa, a former boxer, Ippo embarks on a challenging boxing career filled with formidable foes and rigorous training. Armed with unwavering determination and a resilient body, Ippo sets out to conquer the boxing world.