'Evil is prevalent and vehement'. At least that's the truth that Lee Jiyoung lives by. She's an Italian mafia heir who's been hidden all her life so that she is protected. When her cousin Hong Cha-young asks her to move to Seoul to help Vincenzo win a lawsuit against Babel Group, she decides to help. But she doesn't know that Vincenzo is also a mafia. With secrets of their own, will Vincenzo and Jiyoung be able to unite and take down Babel? Or will they fail and let Jang Hanseok take away everything they love?