"The K2" fans will hear more of Anna's magnificent voice. Girls' Generation's Im Yoona, who plays the role of Anna in the series, will sing an OST for the action series. Upcoming episodes for this week also tease Anna's reunion with his father.

According to AllKpop, "The K2" will release two OST's in this week's episodes; OST Part 2 titled "Once in a While" sung by Yoo Sung Eun, and OST Part 3 sung by Yoona titled "Amazing Grace."

Yoona's singing was first showcased in "The K2" episode 6 which aired on Oct. 8, as her character sang the tear-jerking Christian song "Amazing Grace" at a church where Anna's father, presidential candidate Jang Se Joon (Jo Sung Ha) was attending mass with Choi Yoo Jin (Song Yun Ah) and his political rival Park Gwan Soo (Kim Kap Soo).

On the other hand, spoilers for this week's episodes tease Kim Je Ha a.k.a. K2 (Ji Chang Wook) will save yet another life. In episode 6, Je Ha saved Anna who suddenly passed out due to allergy after eating strawberry ice cream. This time he would save her father, who will be attacked while speaking at a campaign event. Je Ha will be the first to notice a suspicious man and will save him. The teasers show a scene of Je Ha running with Se Joon in an alley while they are being pursued.

Anna will also be reunited with his father. There is a scene of Se Joon visiting Anna after she passed out and he wipes her tears as she is sleeping. Recently, Se Joon's real motive for running for presidency was questioned as Yoo Jin asked him if he is really doing everything for Anna's sake.

"The K2" airs every Friday and Saturday at 10 p.m. KST on tVN.