When big money is at stake, to what levels will people stoop to win it all? Because of varied circumstances, both Nam Da Jung (Kim So Eun), a naive and honest college student, and Ha Woo Jin (Lee Sang Yoon), a former psychology professor at Seoul National University and genius swindler, become contestants on the "Liar Game" reality show, which is billed as a "psychological survival game."
Contestants are expected to lie, cheat and use whatever means possible to emerge victorious and walk away with the coveted 10 billion. Hosted by the devious MC, Kang Do Young (Shin Sung Rok), with the help of his trusty PD, Lee Yoon Joo (Cha Soo Yeon), the reality show pushes its participants to the edge of morality and beyond.
Who will emerge to win it all?