Rusty Bones Roar

Five years ago, Gu Nan became the world champion in international professional boxing but was imprisoned for accidentally killing someone while acting heroically. After his release, banned from fighting due to the incident, Gu Nan struggled to survive by taking punches on the street, which reignited his passion for boxing. To regain his chance to compete, he approached his former coach, only to accidentally get involved in underground boxing bets. Since he can't be the open champion, he will be the underground king. Gu Nan's burning desire for boxing allows his fists, once rusted, to return to the ring.