"IRIS 2" Lee Da Hae and Yoon So Yi fight once again.

During the 20th episode of the KBS drama "IRIS 2" featured Ji Soo Yeon (Lee Da Hae) trying to stop Yoo Joong Won (Lee Beom Soo) from detonating the nuclear bomb.

North Korean spy Park Tae Hee (Yoon So Yi) finds out about the plans of the NSS agents and goes outside. She sees Ji Soo Yeon. They begin to fight but it does not end for a long time. Park Tae Hee punches Ji Soo Yeon and kicks her to a corner. For the first time, Ji Soo Yeon seems to be losing to Park Tae Hee.

Park Tae Hee tells Ji Soo Yeon, "Are you the only NSS agent?" and grabs a knife to stab Ji Soo Yeon four times in her shoulder and her back. However, Ji Soo Yeon is not hurt too badly. Ji Soo Yeon grabs Park Tae Hee's knife and stabs her in the stomach.

Park Tae Hee falls to the ground and tries to attack Ji Soo Yeon as she turns away. However, Ji Soo Yeon looks back and shoots Park Tae Hee to her death.

Meanwhile, this episode also featured the breathtaking gun fight between the NSS agents and the North Korean agents.