Summary
Shin Chi-beom is an amateur MMA fighter with no notable skills. After vanishing for a week, he returns to his next bout plagued by intense anxiety, yet steps into the cage and kills his opponent, shocking everyone with his sudden transformation. Unbeknownst to them, he spent five years in ancient Greece as a combat slave forced into brutal Pankration matches—fighting for his life daily. Upon returning to his own body, he is left deeply traumatized, finding solace only inside the cold, unforgiving octagon. Driven to seek out the strongest opponents, he wonders if he will ever know peace.