Round 6, the original South Korean series from Netflix, follows a group of people desperate for money who receive a mysterious invitation to participate in competitive games inspired by children's games. Without knowing anything about the invitation, hundreds of people flock to the venue to participate in the event. At the end of the game, the winner will be able to take home a millionaire prize and settle all their debts. But what they don't know is that the losers won't make it out of this game alive. Now the competitors will have to fight to survive this macabre dispute.