On the 5th episode of the KBS drama "IRIS 2", Soo Yeon (Lee Da Hae) falls into a state of panic when she begins to feel pain in her hand.

Yoo Gun (Jang Hyuk) shows up late for his meeting with Soo Yeon because of his fight with Baek San (Kim Young Cheol). He appears at the restaurant just before it is about to close and says, "I'm sorry for making you wait for so long." Their conversation eventually led to Jae Yong (Joo Jin Mo) who was murdered.

While listening to Yoo Gun, Soo Yeon panics, just like when Yoo Gun heard the story about Baek San. The reason behind Soo Yeon's panic turns out to be because of the pain in her hand. Soo Yeon had been hired by the NSS under special circumstances because of her background as an Olympic gold medalist but recently, she has been feeling trembles in her hand. This is why she was unable to shoot Ray (David McInnis) even when she had a clear shot while she was positioned as a sniper.

The trembles in her hand began to intensify, making her drop her cup during dinner. When Yoo Gun asks, "Did something happen?" Soo Yeon tells him nothing is wrong. The episode leaves off with predictions of a serious problem in Soo Yeon's hand and what is to come in the future.