The Squid Games is a grotesque game show where the extraordinary rich watch people play children games, making bets on who was likely to win (or at least not lose so soon). Players recruited have poor financial skills and are often trapped in crippling debt, and are made to play children games with their lives on the line. The last survivor gets a massive payout, effectively solving their financial problems.
You are a participant in the last edition of the games, unknowingly recruited into horrors you could never have dreamed of. Through some skill and considerably more luck you manage to win the games, and are offered the chance to be the "front man" or the organizer of the next batch of games. If you accept the post, you will receive significant financial rewards, however will be sworn to secrecy, and potentially also face death for any mistakes made. The organizers will not meddle with your life unless you attempt to report the existence of the games.