She intended to reopen the Bundang female college student murder case that she solved in 2010 because she discovered that the imprisoned culprit Min Jong-bun (Kim Byung-chul) is actually innocent.

The first assignment of the team was the Jung Mi-ryung murder case in which CEO Lee Ro-joon (Kim Bum) of EL Capital is the principal suspect.

Eventually, his tip helped Yoon-jung and her team capture the real culprit Kim Ha-ram (Seo Young).

After meeting with the sole witness Lee Hae-in (Jang Seo-kyung), she confirmed her suspicion that Ro-joon is the murderer in this case.

In the meantime, the Seoul Metropolitan Police Agency set an operation to capture the Gangnam gangster group that controls illegal drug markets across the country.

Next, Yoon-jung and her team take on the suicide case of Cha Seul-ho (Kim Hak-seon) whose body was found in Dong Woo University Hospital.

Recently, his daughter suffering from a rare disease died in the same hospital due to alleged medical malpractice.

It is revealed to the public that EL Capital staged the medical malpractice allegation in order to accelerate the sale of the hospital to the company.

As a result, the sale did not proceed, the scandal damaged the company's image, and Jong-shik stepped down as director to take all the blame.

Meanwhile, Ro-joon's adversary Director Park Joon-young (Lee Chul-min) is on the move to oust him and be the new CEO given the current circumstances.

In addition to Ro-joon's mounting problems, his mother Seo Jung-mi was arrested for bidding in an illegal auction of stolen artworks.

While searching, they found the letter of Ro-joon's late father Lee Bong-jun which states his intention to return his money and properties to society.

He then ordered to smuggle 50 billion won from the cash reserves of EL Capital disguised for supplying the shortage in their branches.

In a desperate move, Ro-joon borrowed 30 billion won in cash with high interest from a private moneylender just to pursue lobbying for his project.

On the other hand, Yoon-jung and her team handled the murder case of Im Min-son in which Lawyer Seo is the primary suspect.

Two years ago, Lawyer Seo handled Lee Bum-jin's will to return his money and properties to society but Director Park took the original copy.

She voted for him in exchange for the evidence that Ro-joon killed his own father because of his decision to return his money and properties to society.

He attempted to escape the country to Brazil with former chief justice Kang but was cornered by the police in hot pursuit.