Kanzaki Nao is a gullible student who comes home one day to find a box with a hundred million yen and a card saying that she has been chosen to participate in the 'Liar Game'. The purpose of the game is to trick other participants out of their hundred million yen within a pre-determined time frame. The winner wins the hundred million yen and the loser is in a debt of a hundred million yen. Kanzaki Nao loses her first game and, after being turned down by the police, hears of a genius swindler named Akiyama Shinichi who has just been released from prison and goes to him for help.
Both shows very much remind of each other, featuring intrigues between people, centring around games in which the players have to trust each other, lie to each other and win to survive and see the next round. The two shows also have a mysterious host whose face is covered.