A cyber crime investigation team is trying to catch the ruthless cyber criminal called Hades after his crimes are linked to the death of actress Shin Hyo Jung. Woo Hyun finds out Hades is Ki Young, his old police academy friend and roommate who dropped out.

Hades tries to clear his name from the murder case. During a secret meeting with Woo Hyun, an explosion leaves one man dead, and another critically injured.

Ki Young (Hades) takes on Woo Hyun's identity. Hyuk Joo becomes the leader of the Cyber Crime team. People who have posted negative comments about Shin Hyo Jung online are getting murdered.

Choi Seung Yeon gets kidnapped by the murderer. We find out more about Woo Hyun's family and his past relationship with Kang Mi.

Hyuk Joo discovers why Woo Hyun is not acting like his old self. A group of hackers called Daehyung plans to release the largest online attack against Daehan Power, which controls the power for all of Korea and the power plants.

After the online attack, Sekang Securities suspiciously merges with SafeTech, an online security company, and makes a huge profit. We find out why Ki Young dropped out of the Police Academy.

Hyuk Joo continues to investigate Woo Hyun and discovers he was involved in the mysterious death of Nam Sang Won, the victim in the Phantom video file.

Kang Mi nearly meets the same fate as the other dead students of Sungyeon High School, which helps the team realize there's a killer in the school. Koo Yeon Ju, a woman who says she is the edior of a newspaper, claims to be Woo Hyun's girlfriend, but he's not so sure.

Shin Hyo Jung's killer finally contacts Woo Hyun. The team finds out the Sekang Group is bugging them and "is watching everyone."

Hyuk Joo puts his badge on the line arresting Sekang's new VP, Cho Jae Min, for the murder of Nam Sang Won through poisoning. But their evidence is not as reliable as they'd think.

Officer Han finds Nam Sang Won's laptop, but meets the same deadly fate as the real Woo Hyun. Details of Cho Hyun Min's past are revealed, and we find out why he wanted Nam Sang Won dead.

Woo Hyun and Kang Mi come clean to Hyuk Joo. Together, they prove Officer Han was murdered and begin reinvestigating the case.

After Woo Hyun and Hyuk Joo arrest someone for the murder of Officer Han, the team finds out there is another accomplice within the NPAC. An internal investigation leaves Woo Hyun fired from the NPAC.

The entire Cyber Crime team gets suspended for the illegal bug Hyuk Joo planted on one of Cho Hyun Min's employees, which somehow ended up in the Prosecutor's Office. Cho Hyun Min is elected CEO of the Sekang Group.

Choi Seung Yeon is beginning to realize her old boss has many similarities to Woo Hyun. SafeTech is using their software to hack the computers of those involved with the Sekang slush fund to get rid of them.

The team tries to save the remaining people involved in the illegal slush fund case over a decade ago, before they fall victim to Hyun Min's plans.

To get closer to the truth, Ki Young manages to meet with Woo Hyun's father.

The trial begins as the cyber crime team mounts a case against Hyun Min, trying to trap him in his lies again.

The trial begins as the cyber crime team mounts a case against Hyun Min, trying to trap him in his lies again.

Hyun Min seemingly finds his way out again, but Woo Hyun is not about to stop so easily in finding justice. Additional investigation brings more unsavory details to light about Shin Hyo Jung's last days.