Jin Goo faces a moment where he feels he needs to make a complaint once again.

During the 9th episode of the KBS drama "Advertisement Genius Lee Tae Baek", the GRC team renewed their contract with the Keumsan Ad Company.

Keum San Ad Company requests for a renewal of their contract. However the renewal contract was like a subcontract. The GRC team is in charge of the advertising for a children's lotion. The team members are extremely dedicated to the advertisement because the success of the lotion ad would bring significant improvements to GRC.

However, Eddie Kang (Jo Hyun Jae) and Ko Ah Ree (Han Chae Young) were planning to destroy the reputation of the lotion by spreading rumors that it is harmful to children. They are aiming to humiliate Keumsam Ad.

Unaware of their secret plot, the GRC team began to squeeze out ideas to make it a success. In the midst of the craze, the Keumsan copywriter Lee Eun Hee (Hong Ji Min) takes Kim Ha Rang (Wang Suk Hyun) to the public sauna and uses the lotion.

That day, Ha Rang's condition begins to get bad to worse. Hives begin to develop all over his body. When he is taken to the hospital, the doctor suspects the lotion is the cause. When Lee Tae Baek (Jin Goo) hears the news, he decides he will not work on the ad for the lotion.

Lee Tae Baek goes to Hwang Jeon Moo (Lee Hae Young) and says, "Check the product one more time" and explained that there was an issue. Hwang Jeon Moo says, "If you tell the lotion brand about this you know you could lose this advertising job. Just choose whether you'll do this ad or not. You remember the contract right? There is a cancellation charge if you decide not to do it." This places Lee Tae Baek and Ma Jin (Ko Chang Suk) in a very delicate situation.

Ma Jin tells Lee Tae Baek, "Wasn't one time enough to be known for complaining within the company?"