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불야성
冷静与热情的化身、兼备能力和财力的企业家徐伊景（李枖原饰）有着强大企图心和目标，为了实现目标，她利用渴望摆脱困苦生活的李世珍（金宥真饰）展开行动，也在不知足不觉中改变着对方和自己。黄金的女王徐伊景、深爱徐伊景的朴建宇（晋久饰）和充满野心的李世珍，两个女人和一个男人为了成为不眠的贪婪火光的主人而展开激烈战争。
Barefoot and drenched in rain, Se-jin stops Yi-kyung's car. Flashback to a week earlier, the two women meet for the first time at a charity auction.
Waiting for Se-jin are two Chinese-speaking men, but no picture is to be found. Meanwhile, the general meeting begins without Yi-kyung present.
Bored with her first assignment, Se-jin gladly accompanies Tak on his errand. Despite being given strict rules, Se-jin gets a little too curious.
The fateful encounter between Park Gun-woo and Yi-kyung occurs 12 years ago in Japan with a misunderstanding involving a scammer and a broken guitar.
Yi-kyung and Gun-woo finally come face to face. Unlike Gun-woo, who is saddened by their bitter reunion, Yi-kyung maintains her emotionless façade.
Jang Tae-joon, hoping to pull both Yi-kyung and Gun-woo to his side, suggests the two work together. However, neither is willing to make compromises.
For Se-jin's next assignment, Yi-kyung asks her to steal a man's heart. For Gun-woo, winning Tae-joon's support may mean putting his father second.
While Yi-kyung visits Park Moo-il to acquire hints about Jang Tae-joon's weaknesses, Gun-woo meets with Tae-joon to declare where his loyalties lie.
Yi-kyung manages to get Park Moo-sam and herself invited to Jang Tae-joon's office. The news of their private meeting reaches Gun-woo's ears.
After hearing the real reason for Yi-kyung's visit to the hospital, Se-jin becomes conflicted about helping her and comes to a difficult decision.
Gun-woo's plan to acquire joint management rights will come at a big price. Meanwhile, Moo-sam and Yi-kyung prepare to launch a counterattack.
Yi-kyung misses an important meeting due to a miscommunication from Moo-sam. She begins to sense that there are forces working behind her back.
Dissatisfied with Jang Tae-joon's move regarding Park Moo-il, Yi-kyung warns him to follow her plans. But Tae-joon orders her to know her place.
As a last resort, Yi-kyung uses her father's notebook against Jang Tae-joon. Meanwhile, Se-jin and Gun-woo continue their probe into Collin Company.
Yi-kyung disregards Jang Tae-joon's pick among the presidential candidates. Meanwhile, Gun-woo returns to his old office ready to protect his company.
After hearing Yi-kyung's plans for him, Tak packs up and leaves. Yi-kyung presents Kang Jae-hyun with a shocking offer to help him in the election.
Gun-woo offers a deal to the prosecutor who is investigating him for data theft. Se-jin meets with Son Eu-sung, not realizing Tak is spying on her.
Jang Tae-joon offers to help keep Kang Jae-hyun's company from being sold. While at the hospital, Se-jin learns how Tak began working for Yi-kyung.
Jang Tae-joon orders his secretary to search for Yi-kyung's weaknesses. Predicting this, Yi-kyung prepares to end the battle once and for all.
Despite his dad's objection, Gun-woo persists in his feud against Yi-kyung. By hiring hackers, he plans to break into Gallery S's computer system.
