In this lawless city on the border, your fist is your household registration book. Zhen Zhuo was once an abandoned disciple of a martial arts school. After having one of his legs broken by his master, he was thrown into an underground boxing ring and became a punching bag sparring partner. She is burdened by loan sharks, and her sister is seriously ill and needs expensive drugs to stay alive. The only thing he could do was to be patient.
Until that night, the boxing ring arranged for him to fight the debt collector's thugs. In a pool of blood, he saw a line of scarlet writing appearing above the opponent's head: The blood crime amount is thirty-seven, and defeating him can take away the life traits. Zhen Zhuo stood up with his broken leg, and on the verge of death, he killed his creditor and seized his "iron bones".
From then on, anyone who owed a blood debt became the name on his debt book. What Zhen Zhuo wants to do is to drag the entire city into the ring, and one person can judge the city. Who can still owe debts?