The three main characters of this drama pose the question of what a “righteous life” is in the era of political and social turmoil of the late Joseon Dynasty, when progressive thinking and the Confucian social reform movement “Silhak” began penetrating into Joseon from the Qing Dynasty. It was also a period when the 400-year Joseon Dynasty was gradually losing ground, unable to respond to external and internal changes in the wake of the Japanese invasion of the 16th century and the Manchu War, resulting in clashes between the king, who dreamed of restoring his authority through powerful reforms aimed at improving the lives of grass-root people, and conservative political forces, which felt threatened by the self-justified royal authority.

It is the story of Song Ci , the father of the world's forensic medicine, and the subject matter is selected from his book "The Collection ". The basic set of laws, anatomy, phlegm, surgery, orthopedics, and laboratory science are created in one body. It consists of 11 suspenseful and horrifying murders, such as "Li Fu Chain Case", "Liang Yu Life Case", "Leading Fan Marriage Case", etc. Each unit has a mystery case, which fully combines suspense and story.

Angkor is the beautiful daughter of a high rank officer of Cambodia. Before she was born, her father had slain a tiger. The spirit of the tiger lives on inside of Angkor and possesses her when she looses herself to her anger. An inner struggle in Cambodia forces Angkor and her friend/body guard, Koytee, to flee to Thailand. Along the way, they get separated. Angkor eventually arrives at the refugee camp in Thailand alone awaiting Koytee. There Angkor meets Pookong Kan, who was secretly sent to investigate the case of several missing and deadly war weapons that may be linked to a few of the officer's corruption. By chance, Angkor gets mixed up and becomes an important witness to the murder of Pookong Kan's comrades by Muad Rit.

At the end of the Yuan Dynasty, when Mongolia ruled over all the Chinese Continent, the Mongols, the Hans, and Koryo (ancient Korea) migrants were engaged in racial conflict. The son of a Koryo migrant, Jinha, and the illegitimate daughter of a Mongol general, Sullie, become true friends and eventually fall in love. However, the love and loyalty between them cannot last. When Sullie􀁳s mother dies of a chronic disease, her merciless father Taruga takes her to Sohung with him. She promises to wait for Jinha at a pagoda in Sohung on the day of every full moon. But against their will, they become swept up in the current of these tragic times...

The winter for third-year university students is the crossroads in their lives. The season where they are confronted with life choices. It is a season that students cannot disregard. There are those who are about to become adults without making any of their own decisions as well as those who have made up their minds. 21-year-old Matsuoka Aoi (Arimura Kasumi) dislikes making trouble for the people around her. Although she likes the sea, she has given up on her dream of oceanographic research and is about to obey her parents (Sakai Maki, Yajima Kenichi) and get a job with their connections. At that moment, she unexpectedly meets students of Kaiyo University and they have to work together for a time at an aquarium near the sea. The sight of them pursuing their own dreams starts to influence Aoi little by little and their own lives also start to change too. Nagata Taku (Yamazaki Kento), Aoi’s childhood friend who has been wholeheartedly in love with her; Yamauchi Kota (Kubota Masataka), the senior whom Aoi admires; the proud Saeki Yuka (Narumi Riko) who is Kota’s ex-girlfriend; Serizawa Ryo (Asaka Kodai) who has something like love for Yuka; Niwa Reiko (Seino Nana) who cannot break off her affair with a married university old boy, Ichinose Hisashi (Ozawa Kazuhiro); Iino Sosuke (Yamoto Yuma) who has given up on his dream because of his parents’ debts. And then, there is the enigmatic photographer, Kondo Shunji (Higashide Masahiro) who passes by Aoi. While the eight of them spend time together, love and friendship gets entwined.

Azuma Wataru, a third-year student at Karasumori High School, is a devil who strikes fear in the hearts of people. One day, Azuma is told by his form teacher that he has to participate in a club activity in order to make up for the lack of second-year students. The short-tempered Azuma cannot last long in whatever he does. At that moment, he learns that Satonaka Mari, the beautiful transfer student in his class, has joined the female rhythmic sports gymnastics club. He joins the male rhythmic sports gymnastics club, a club activity with very few people under the captain, Takenaka Yuta. They are ridiculed by the coach of the female rhythmic sports gymnastics club, and others, and are also hardly allowed to use the gym. However, when a sixth boy joins the club, Yuta decides to take part in a team competition with his long-sought six members …

The Empress is in her early 30s, but she is still not married. Since the 1st successor to the throne died, the royal family is in search for a new successor. Incidentally, they come to know of a young man who was, in fact, the prince's son of a woman who left the Palace in order to keep her pregnancy a secret. The young man's name was Lee Hoo, more commonly known to his friends as Kang Hoo.

Lee Hoo worked as a delivery boy at a Chinese restaurant and was known for his 7-minute maximum delivery time. Lee Hoo had been brought up as more of a punk than a prince so his habits and his way of conversing were very different from the people of royal blood. Although he had never dreamt of living in the Palace, he one day finds himself immersing himself in its grandeur and improving himself to prove that he indeed deserves to be called the Successor to the throne.

He soon finds out that not only will he be facing lessons to the path of royalty, and dilemmas of love and of stature, but he will also learn to compete for the position he had been, first and foremostly, called for.