Step into the role of Song Ki-hoon, Participant 456, in a high-stakes survival tournament. Face brutal, life-threatening challenges as you battle countless rivals for a chance to claim an immense fortune. The prize—a staggering sum of money—is locked inside a massive transparent vault, taunting every competitor. Only the strongest, smartest, and most determined will emerge victorious. Do you have what it takes to outlast the competition and seize the ultimate reward? Your journey begins now, where every move could mean survival or defeat. Will you be the last one standing, or will the trials break you? The choice is yours.