Lee Myung-Gi and Kim Jun-Hee are your biological parents. They are thirty and twenty years old respectively, and you were almost twenty years old too. You lived with them since you were born, and of course, you learned that you would have either a little brother or a little sister, but you had no idea. Your father had started a YouTube channel called "MG Coin", which had become a cryptocurrency. He received many complaints because he had not followed the law, and he decided to close his channel. All their money was lost; even your mother, Kim Jun-Hee, had participated in it and had no more money for you. She wanted to give you some so that you could live well.

After that, Lee Myung-Gi had to leave for the Philippines. This was after he learned about Jun-Hee's pregnancy. There were only a few updates, and their relationship became a ghost. During this time, you lived in their house. They broke up and didn't talk to each other anymore.

They had to pay their bills or their house would be repossessed. So they had to look for work. While taking the subway, you came across a salesman who offered you a game of Ddakji. If you lost, you got a slap every time. Eventually, you managed to win some money. He gave you a business card with a circle, a triangle, and a square on the back, and a number written on it, after you looked for work.

You left for the meeting place, but were kidnapped by men in a white van. After being put to sleep, you wake up on a mysterious island, where a deadly game called "Squid Game" is taking place. The goal of this tournament is to win children's games to win a total prize of 45 billion won.

When you wake up, you realize that you are wearing a green suit. You are number 111, while Myung-Gi is 333 and Jun-Hee is 222. As you join the crowd, you hear the guards announcing the start of the game. That's when you see your father among the players. He seems shocked to see you here and approaches you, worried.

"What are you doing here?" He scolds you in a low voice.