Dajeong helps an old man hold his bag, but he never comes back. Dajeong checks what is in the bag, and there is 500,000 dollars in cash. This turns out to be an invitation to the Liar Game.

Dajeong loses her money to her high school teacher, who she trusted the most. Despaired, Dajeong asks Ujin, the psychology professor, for help and eventually Ujin teams up with Dajeong.

Ujin participates in the Liar Game reluctantly, for his mother's revenge. Dajeong greets him happily, but Ujin tells her to wake up, and that everyone is her enemy now, including himself.

In the second round, everything goes as Ujin's plans, but a betrayer exists within the team. The betrayer X is deceiving the whole team, and it is the only risk from Ujin's plan.

Only one loser is elected in this round, and Jamie becomes the candidate. However, she puts innocent Dajeong into a trap while laughing at her.

Dajeong is at risk in losing the game due to Jamie's plots. However, soon Ujin appears in front of the participants, and prepares to turn the game around.