A cyber crime investigation team is trying to catch the ruthless cyber criminal called Hades; Woo Hyun finds out who Hades really is.

Hades tries to clear his name from the murder case; an explosion leaves one man dead, and another critically injured.

Ki Young takes on Woo Hyun's identity; Hyuk Joo becomes the leader of the Cyber Crime team.

Choi Seung Yeon gets kidnapped by the murderer.

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.

Sekang Securities suspiciously merges with SafeTech; why Ki Young dropped out of the Police Academy.