"IRIS 2" Kim Young Chul discovers that Jang Hyuk is his biological son and begins to panic.

In the 11th episode of the KBS drama "IRIS" that aired March 20 featured Baek San (Kim Young Chul) finding out Jung Yoo Gun (Jang Hyuk) is his biological son.

Soo Yeon (Lee Da Hae) tries to figure out Baek San's past by looking at a photo she received from Yoo Gun's mother Jung Soo Min. Soo Yeon later finds out from Yoo Sang Cheol that Baek San and Yoo Sang Joon are the same person. She also finds out that Jung Soo Min and Baek San both believe each other to be dead.

In order to agree to the request made by IRIS to trade Yoo Gun and Baek San, Soo Yeon reveals the truth to Baek San. After hearing from Soo Yeon that Yoo Gun is his son, Baek San says, "I'll agree to the trade if you tell me everything Yoo Sang Cheol told you." Baek San begins to tear as he thought of the moment he met Jung Yoo Gun.

Also, Park Tae Hee (Yoon So Yi) tries to steal confidential secrets from the NSS. Park Tae Hee impersonates a different agent and steals Baek San's information on the NSS server. After stealing the information, Parkt Tae Hee tries to send the information to Yoo Joong Won (Lee Beom Soo).

The whole scene was captured by the NSS agents. NSS agents stop her download and successfully delete all the information she stole.