During the Qingli Era, troubling affairs brew underneath the prosperity and stability of the Northern Song Dynasty. Separatist regimes are secretly operating in the capital city of Dongjing, spying on the secret affairs of the Song Military. To avoid war and protect the peace between its people, the Northern Song uses the name of "Mi Ge" (Secret Cabinet) to train young spies. For a variety of reasons and whether willing or unwilling, these six become the Seventh Room of Mi Ge after strict selection and examination: cunning and intelligent Yuan Zhong Xin; beautiful and resourceful Zhao Jian; Xiao Jing, who can’t even kill a fly; never-lying Wang Kuan; antisocial Xue Ying; and admirer of beautiful women, Wei Ya Nei.

Upon first entering the school, each acts out of their own self-interest, making a mess of their surroundings and causing headaches for their teachers. After going through a series of life-and-death missions, the previously ignorant boys and girls gradually mature and form bonds with one another, devoting their determination and loyalty to defending the peace. Burying their names, they become unknown legends within the river of history.

A strong-willed disciplinarian mother (tiger mother) faces mountainous pressure raising her daughter, while her husband (cat father) has an opposite view of how to raise their daughter. Qian Qian is the school-aged daughter of Bi Shen Nan and Luo Su, and the princess of the family. After learning from others that the educational foundation starts in elementary school and witnessing first hand the difficult process of entering a great school, Bi Shen Nan finally realized that they have spoiled their daughter for way too long. Determined to catch her daughter up with all the other kids, she has quickly grown into the role of a tiger mom while her husband maintains that the happiness of Qian Qian is the most important, even if that means being academically behind. Mixed in the bag are two sets of opinionated grandparents and the reappearance of Luo Su’s gentle ex-girlfriend.

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A wave of gruesome murders is sweeping Tokyo. The only connection is a bloody X carved into the neck of each of the victims. In each case, the murderer is found near the victim and remembers nothing of the crime. Detective Takabe and psychologist Sakuma are called in to figure out the connection, but their investigation goes nowhere. An odd young man is arrested near the scene of the latest murder, who has a strange effect on everyone who comes into contact with him. Detective Takabe starts a series of interrogations to determine the man's connection with the killings.

This drama is about a forensic doctor and prosecutor who work together to catch a serial killer. Baek Bum (Jung Jae Young) is a forensic doctor with 10 years of experience at the National Forensic Service. Although his skills are recognized and he has performed the most autopsies in Korea, he is eccentric and has a picky personality. Meanwhile, Eun Sol (Jung Yoo Mi) is a prosecutor working in the 8th Eastern District. As she was born into a wealthy family and possesses photographic memory, the detective is a warm, sensitive character who aims to connect with people’s hearts and pursue the truth.

Nishikido Ryo acts as a popular idol and member of Kanjani8 (or as himself) who secretly marries a woman with three children. This comedic drama portrays the reality of show business and the importance of a family bond. Ryo has come to his girlfriend Haruka's house to ask her mother and children for her hand. Her eldest daughter refuses flat out saying that she doen't want an idol as her father. To make things worse, Kanjani8's manager finds out about the marriage and tells him to either get divorced within three months or end his career in show business.

A woman begins to think of herself as damaged goods on the love market after her long-time boyfriend dumps her. A new love story begins when she meets the man who helps her realize the value of second-hand goods.

A story of love and friendship between five high school students from Seoyeon High School.

Lee Ha Min appears like a bright person, but there is also darkness within his mind. Han So Mang is a warm-hearted person, but she is also quite timid. Lee Jae Min is a popular student with a painful past. He is kind to everyone around him. Yoon Bo Mi is a sweet, model student. Choi Jin Young loves playing games. He can seem unfriendly and has a delicate personality.

Adapted from the webtoon "Seasons of Blossom" (청춘 블라썸) by HONGDUCK and NEMONE.