Kim So-eun

 Lee Sang-yoon

 Shin Sung-rok

Nam Da-jung is an innocent college student who passes a hidden camera audition and is invited to join the reality show Liar Game, a psychological survival game wherein participants trick each other and the one who ultimately succeeds wins the prize money of \10 billion (US$9.3 million). Tempted with the chance to pay off her debts, Da-jung joins the game and gets conned out of the initial money given to her. In desperation, she asks genius ex-con swindler and former psychology professor Ha Woo-jin to help her win the game.