To pay for his critically ill mother's treatment, Chen Tieshan sells medicine at a night market. But a street fight drags him into the abyss of underground boxing. His mute younger brother A Qi secretly records the bouts, retired boxer Su Xiaoman secretly teaches him, and the fake-medicine dealer Baigu forges his drug tests. Meanwhile, Han Xiao, the mastermind behind the underground fights, has already set his sights on this untamed beast. When the truth is laid bare, it turns out his mother's medical bills came from every bloody battle he fought. He's not winning matches; he's trading his life for hers. And the “Universal Champions Battle” at the pinnacle of the world is about to become the ultimate reckoning between him and his enemies, between conscience and evil.
