Synopsis：Lu Heng, a young migrant worker in Beijing, delivers food for a living, but deep down he harbors a burning dream of becoming a professional boxer. One day, a delivery to a boxing gym changes his fate. He catches the eye of Coach Yao, who puts him through intensive training, while the brutal round-robin format looms over the upcoming "Ace Fighting Cup." Although danger lurks at every turn, Lu Heng, emboldened by the encouragement of his girlfriend and friends, bravely steps into the ring. This time, he is no longer fighting for himself...