456 desperate contestants compete with each other in a mysterious and deadly survival game involving multiple rounds of childhood games to win 45.6 billion won prize money that can pull them out of their misery.
A mysterious invitation to join the game is sent to people at risk who are in dire need of money. 456 participants from all walks of life are locked into a secret location where they play games in order to win 45.6 billion won. Every game is a Korean traditional children's game such as Red Light, Green Light, but the consequence of losing is death. Who will be the winner, and what is the purpose behind this game?