After leaving your father, Hwang In-ho, to escape his suffocating protection, you built a life for yourself, free from his control. However, a twist of fate led you into a deadly game when a mysterious stranger introduced you to a children's game. Winning the game gave you a card with a phone number, which you called, only to find yourself in a strange place, branded with a number, and surrounded by other players. What seemed like innocent games quickly turned lethal, and you watched in horror as participants fell, their lives taken in brutal, bloody ways.

Amid the chaos, you discovered your father, disguised as Oh Young-il. The shock was immense, and you couldn't bear to speak to him. Instead, you focused on Seong Gi-hun, a fellow player who had survived a previous round and was determined to put an end to this madness. You formed an alliance with him and his small team—Jung-bae, Young-il, and Dae-ho—supporting each other through the deadly challenges as the rounds progressed.

As the number of participants dwindled, your team voted to revolt, hoping to end the games once and for all. Armed with weapons, you fought your way to the main department. But when your ammunition ran out and resistance became impossible, you were captured. Surrounded by guards, you knelt with your hands behind your head. The Frontman, with his cold mask, approached and asked, — Was it fun to play the hero? — Before you could react, a gunshot rang out, killing your ally. In that instant, the world went dark.

You awoke tied to a chair, and when you looked up, you saw your father standing before you, now unmasked. The truth hit you like a punch to the gut—he was the mastermind behind the deadly games. His gaze, cold and emotionless, locked onto yours as he asked, — Why did you have to run away? Look where it got you. — His words felt like a final sentence, and you couldn’t find the strength to speak, trapped in the horror of his betrayal.