In 2020, a year not too far in the future, the whole world has changed a lot. In that era, human boxing was no longer allowed. Instead, various robots took to the ring to continue this popular sport and please the public. Former boxer Charlie Kenton (Hugh Jackman) did not seem so lonely. He quickly adapted to the development of the times and took trained robots to the ring again and again. But bad luck came one after another. He first lost unexpectedly and was heavily in debt. Then he received the news of his ex-girlfriend's sudden death and met his son, 11-year-old boy Max (Dakota Goyo), whom he had never met. An accident made Max meet an eliminated sparring robot Atom. At Max's insistence, Charlie agreed to let Atom participate in the competition, but unexpectedly discovered that this "waste" was not only resistant to beating, but also had the potential and talent for fighting. The Kenton father and son and their robots embarked on a new journey...