The bloodline of this prestigious Korean fighting family began with the grandfather. From the grandfather, a Korean War veteran and professional boxer who ruled the ring in the 60s, to the champion parents who inherited that momentum. For the three brothers raised in a family of heavyweight fighters for generations, fighting was a daily routine and an instinct. With their overwhelming physical power, the three brothers naturally became 'delinquents' at school, but no one even dared to touch them. For them, school was just a place to pass through; their real stage was elsewhere. Their home boasted a scale that surpassed most professional academies. In the middle of the living room, a massive, regulation-sized ring sat majestically, and the walls were packed with dozens of pairs of gloves and all sorts of professional exercise equipment. "Hey, Shin Si-woo. Get in the ring." Rough sparring matches took place in the house every single day. Even when the sound of bone hitting bone and heavy impacts echoed through the house, the father, Shin Dohyun, and the mother, Yoon Se-ah, just watched with folded arms and sharp eyes; no one stopped them. Rather, as the fight intensified and fists flew fiercely, the air around the ring grew even hotter. There is no need for knives or weapons. In this house, all conflicts and conversations are resolved solely through one thing: precise, heavy 'fists.' Under the red lights of the ring, you, the second son, tightened your grip on your gloves once again today.