Watch Unlock My Boss

Does he see what he believes, or believe what he sees? As In-seong finally solves the puzzle of "Kim Seon-ju, a smartphone, and Baro 4.0," he prepares for the last battle with Bumyoung. On the day of the self-driving vehicle test-drive, In-seong sets out on a deadly race while the entire nation is watching.

Getting the CEO position back, In-seong feels the absence of his partner who has always been by his side. But there's no time to be sad. In-seong negotiates a deal to get Seon-ju's body back, not knowing what consequences it will lead him to.

As Bum Young stands firm, In Seong holds a shareholders' meeting to take down and bring the executive to justice. However, the power game turns out to be much more complicated than he thought. While In Seong is about to be removed from his post, MG starts searching for Kim Seon Ju alone.

With the help of Seon-ju inside the smartphone, In-seong discovers Seon-ju's body in their enemies' base. Everything starts to fall into place and In-seong finds out who is behind all this. Then he draws up a plan to play one enemy off against another.

Witnessing death before his eyes, In-seong gets shocked. He goes back to his hometown to protect himself and his family, which are more precious to him than one billion won Seon-ju had promised. After realizing he wasn't driven only by money, he comes back and starts investigating who attacked Mr. Kwak.

In-seong is determined to catch the real culprit after he sees how much Min-ah misses her dad. He manages to corner Mr. Kwak, who had the answer to everything, but something unbelievable happens.

After CEO Oh Bum-geun passes away, the fight to become his successor becomes more tense and the threat against In-seong and Se-yeon grows. In-seong wants to hire a security guard, but for some reason Se-yeon disagrees.

In Seong and Se Yeon now shares the secret about Seon Ju trapped in a smartphone. The closer they get to the truth, the bigger the suspicion against him grows. Bumyoung's executive director, Mi Ran's advice, "Don't trust Kim Seon Ju too much" keeps bothering In Seong, and he ends up checking out the place where Seon Ju went missing. There, he encounters a mysterious man

While In Seong is confused by the texts and call from the unknown number, Seon Ju believes it's a chance to track the caller. On the day of the meeting where Silver Lining's enemies within and out are gathered, In Seong collects all executives' phones using security as an excuse. As he calls the unknown number back, one of the phones rings.

Becoming a CEO overnight, In Seong corrects injustice with the absolute power he gained on the first day at work. As he tracks Seon Ju's whereabouts on the day of the accident, suspicion against Ms. Jung, who may be a reliable ally or a deadly enemy, starts to grow.

Park In-seong's interview at Silver Lining doesn't go as planned. An incident during a trip leaves Kim Seon-ju sending out a plea for help.