A high-stakes legal battle unfolds as a lawyer must save a genius serial killer to protect his daughter, while an elite prosecutor fights to sentence him to death.

Yoo Eun-ho, a single dad armed with perfection, becomes the secretary of Kang Ji-yoon, the CEO of a popular headhunter company, who doesn’t do anything except work.

Trapped in the deadly cursed “Mafia Game,” the students of Yoo-il High must play the game to survive, while unraveling the mysteries behind the curse.