Yong-mi, who is suffering from a predicament, overhears Tae-kyung's secret phone call, who is misusing inside information. Faced with a once-in-a-lifetime opportunity, Yong-mi takes a step into the back alley of the financial markets for a 'normal life'.

Yong-mi discovers a side of Suja he shouldn't have seen! However, for some reason, Soo-ja behaves differently from Yong-mi's expectations, and Yong-mi and In-kyung use the information they obtained after the twists and turns to invest in stocks for the first time in their lives. Meanwhile, Taekyung detects a strange sound coming from inside the ventilator...!

As things get worse, In-kyung and Yong-mi leave Bestid to find new jobs. Worse, Yongmi is in danger of losing his children. Yong-mi decides to find out the name of the 3D printer company to bring his kids...

Yong-mi is undecided between the two companies, so what's Yong-mi's choice? In-kyung accidentally gets Tae-kyung's project call, and Yong-mi hides her identity and attends an insider meeting. However, an unexpected person appears...!

Yongmi's heart almost exploded when he met grass in an unexpected place. Yongmi escapes the crisis on his own terms at the insider meeting. Yong-mi, In-kyung, and Su-ja begin a plot to infiltrate the Ilwon Foundation to obtain information...