The story takes place in the distant 26th century. Surgeon Ide (Christoph Waltz) picks up a mechanical girl with only her head left in a garbage dump, takes her home, puts her in a prosthetic body originally prepared for his late daughter, and names her Alita (Rosa Salazar). After awakening, Alita became very interested in this colorful but violent and cruel world. After meeting young Hugo (played by Keean Johnson), Alita began to come into contact with the sport called motorized ball., and showed amazing fighting talent in the competition. Above the residents of Scrap Iron City, there is the huge floating city of Salem floating. All the work and efforts of the residents of Scrap Iron City are to provide Salem with fuel for its continued operation. In the motor ball competition set up by the big tycoon Viktor (Mahershala Ali), the winner can be qualified to live in Salem. Alita decides to use her fighting talent to participate in the competition, but she is embroiled in a huge yin...