In a desperate attempt to revitalize his stagnant career, prosecutor Bang Tae Seop (Ju Ji Hoon) hatches an absurd, but daring plan: take down the mayor of Seoul by exposing her corrupt ties to Lee Yang Mi (Cha Joo Young), the head of the WR Group conglomerate. Tae Seop recruits Hwang Jeong Won (Nana) to serve as an informant and manages to convince Kwon Jong Uk (Oh Jung Se), a WR Group heir with his own grudge against Yang Mi, to join his cause. However, Tae Seop soon finds himself in a more complicated situation than he initially expected when he discovers that his wife Chu Sang Ah (Ha Ji Won), a formerly-loved actress, may be hiding dangerous secrets from him.