Boxing champion Lin Zhan was framed by his girlfriend and his opponent, and he died with hatred after being punched hard. When he opened his eyes again, he was reborn as an eight-year-old boy named Lin Fan! What shocked him even more was that the ten-year-old boy from his neighbor's house was actually his coach Chen Gang who was also murdered in his previous life! In this life, the two kings return. With their past life memories and endless anger, they embark on the boxing journey again with their immature bodies. From basic physical fitness to peak skills, from domestic dominance to global power, they will use their absolute iron fist to crush all enemies! The fateful battle came again. Standing at the top, Lin Fan looked down at his defeated generals: "Your conspiracy is vulnerable in the face of absolute strength!" This time, they will take back everything they lost with their own hands and create a legend that no one can match!
