Kanzaki Nao (Toda Erika) is a simple and innocent female college student. One day, she accidentally received a package. After opening it out of curiosity, she found that she was involved in a fraud game called "Liar Game", which required her to deceive her opponent to get a bonus. In the first round, under the sweet talk of her opponent, the credulous Nao handed over all the money in her hand, and then she found out that she had been cheated. According to the rules of the game, the loser Nao will be burdened with a huge debt of up to 100 million yen. In desperation, she found the genius fraudster Akiyama Shinichi (Matsuda Shota) to help her recover the money. Akiyama was moved by Nao's innocence and kindness, and agreed to participate in the game and find out the mastermind behind the scenes. As the second, third, and fourth rounds progressed, the game became more and more cruel and fierce. The two were gradually drawn into the abyss of the game, and the truth gradually surfaced...