A Korean-style spy investigation show with a story about a top National Intelligence Service (NIS) agent. In his endeavor to uncover the internal traitor that brought him to his downfall, he confronts a much bigger enemy behind the organization.

Han Ji Hyuk is the top field agent in the NIS. He is held in awe by his colleagues for his perfect record and skill at completing missions. He had been driving an organized crime syndicate into a corner when he vanished off the face of the earth, but he returns a year later to shake up the syndicate once more.

Seo Soo Yeon is the head of team 4 of the Crime Information Center who is excellent at performing her duties and solving cases. She has great affection for people, and she especially cares for her teammates.

In Tokyo, a murderer leaves his signature, an `X`on the dead body. When found, the mark appears eerily similar to that of the one seen on the body of the dead wife of Detective Genji Ando. Banned from the investigation, he secretly reaches out to Jin Jinbo, an associate professor at the medical school`s genome analysis lab. Who better than a DNA expert to identify this potential serial killer?

In the birch forest of a small town at this time, Wang Xiang, a taxi driver, could never expect to meet the person that he most wants or fears to meet in his entire life. Is he an enemy or a friend? Since he has met him, he has to get closure, not just for him but also for his son.

In the birch forest of a small town at that time, Wang Xiang, a train driver, was full of vigour and vitality, for he was driving a steel monster with twenty carriages. But on the one hand, he failed to run a small family of three filled with trivial matters. On the other hand, he was trapped in a faltering factory with a crisis looming up from every corner.

A pack of unidentified body parts was dropped in the birch forest, just like a stone into the calm water. For the past twenty years, Wang Xiang could never stop thinking about that pack, not even when the leaves in the fall turned yellow. A lost father, a dead lover and old friends meeting up again were trapped in three different eras because of an unsolved mystery. All they want is to find a truth that travels through the past, the present and the future. When the mystery is revealed, only the elegy of fate and the era is left in the long season with time and space intertwined together.

The story revolves around three troubled youths who find solace in their common experiences to become the best family that they can be for each other.

Growing up in dysfunctional households, three individuals who are unrelated by blood treat each other like family as they yearn for the love that they cannot find at home. Eldest brother Ling Xiao, second brother He Ziqiu, and youngest sister Li Jianjian grow up together, experiencing life’s joy and strife as they support each other’s chosen paths.

As Ling Xiao and He Ziqiu graduate from high school, they return to their original families. Five years later, the three are reunited, but the heartaches from their complicated family past becomes a shadow that constantly lingers. Can they finally fix their personal issues to become better versions of themselves?

This drama is about the story of the people who gathered together to form a music band.

Shin Suk Ho (Ji Sung) worked for the biggest entertainment company as a director, but he is now the CEO of a new and tiny entertainment company. He gathers people to form a band. Through various incidents, Shin Suk Ho becomes a real and successful manager.

Thirteen-year-old Heo Yeon Woo, the daughter of a high-ranking official, accompanies her mother to the royal palace to attend her brother, Heo Yeom's civil service examination congratulatory ceremony. By chance, she comes across Crown Prince Lee Hwon. They fall in love and Yeon Woo is chosen as the Crown Princess of Joseon.

Before they can marry, however, the Dowager Queen secretly orders her death, in order to install Yoon Bo Gyeong, the daughter of a family clan, as Crown Princess, thus securing more power for herself. She orders head shaman to cast a spell on Yeon Woo to stricken her with an unknown sickness. After dying, Yeon Woo is resurrected from her grave, but loses her memories. All believe her to be dead, including the Crown Prince Lee Hwon, who refuses to love another. Eight years later, Yeon Woo returns as a shaman named Wol (meaning moon). Meanwhile the young king begins to investigate the death of his love after seeing the grown up Wol. But he is fighting against time, because the queen's powerful political clan wants him removed from power.

"Can't save the patient's life" is not a strange sentence for Tin, an emergency medicine doctor who has had to get used to this kind of situation and outcome. But what will happen when he is given a second, third and countless more chances to help a young student to survive? Is saving this young patient's life the only way to end the Triage time loop?

Adapted from the web novel "Triage" (ทริอาช) by Sammon_Scene.