"The K2" drama made a successful debut by giving its viewer a rollercoaster ride at the start of the series. What surprises await main characters Je-Ha and Anna in this week's episode on Friday?

In the last week episode, Je-Ha was assigned to monitor Anna, the daughter of presidential candidate Jang Se-Joon. Anna suffered from a trauma in her childhood, giving her phobia on bright light as well as on meeting other people.

Upon looking to Anna, Je-Ha was overwhelmed recalling that he had met her six months ago in Spain. He even helped her from someone who tried to rob her.

Anna was placed in an orphanage in Spain since she was a little girl. Her father Se-Joon is a chaebol who did not want to accept her because she is an illegitimate daughter.

When Se-Joon runs for president, he brought Anna back to Korea to hide her so nobody will be able to dig his past.

Je-Ha was hired by Se-Joon's wife, Choi Yoo-Jin, to take care of Anna. However, there are many secrets in Se-Joon's family that can endanger both Anna and Je-Ha.

In his past, Je-Ha is a renowned secret service agent of the JSS and highly trained in combat arts. However, during one of his missions in Iraq, something went wrong. He became a fugitive and hunted by everyone including his own country, according to a synopsis by Osen.

After his problem was resolved, Je-Ha returned to Korea.

The "K2" is a high action and thriller drama, which jumps straight into the action from the very beginning of its first episodes. After a non-stop action and so many puzzles in the first three episodes, Episode 4 began to slowdown.

But there are more actions and mysteries that await viewers in this week episode. What will it be?

Catch "The K2" is every Friday and Saturday on tvN at 8:00 p.m KST (GMT+9). International viewers can watch the drama via designated cable channel provider that partnered with tvN in their respective country.