Guo Jie is a wandering martial arts master who would rather roam free as a plain-clothed citizen than be tied down by a position in the imperial court. He, along with Wei Qing, Huo Qu Bing, Li Gan, et al., are famous heroes of the Han dynasty. No thanks to some despicable individuals each with their own selfish motives, Guo Jie and his friends unwillingly become entangled in a quest involving Fa Shu and Xin Shu, two mysterious, but powerful manuscripts.

Hong Kyung-Tak (Cha Seung-Won), a good-hearted citizen with high morals, returns from the army and gets hired as the body guard for KBB Security Company. Han Sung-Soo (Song Yil-Gook) is the president of KBB Security. When Sung-Soo attempts to bring down a politician through bribery, Kyung-Tak quits his job and joins another security company led by his friend. Park Yoo-Jin (Han Go-Eun) is a female bodyguard who works at KBB. A love triangle forms when she begins developing feelings for Kyung-Tak, while at the same time, Sung-Soo has feelings for her. When Yoo-Jin learns of Sung-Soo’s corrupt dealings, she decides not to give him a chance to be with her. The love triangle worsens when Kyung-Tak’s sister’s friend, Na Young (Yim Eun-Kyung), moves into the neighborhood and begins liking Kyung-Tak. Unfortunately for Na Young, Kyung-Tak only sees her as a little sister.

Oshii Takashi is a detective with excellent reasoning power. Unfortunately, he usually misses the criminal in front of him and other detectives get recognition for the capture. He is transferred to the Utobashi Police Station.

Oshii Takashi goes to a record company CEO's house. The CEO's third son was burned to death. The police are set to conclude that his death was an accident, but Oshii Takashi thinks otherwise. Oshii Takashi begins to investigate.

Aroonchai gets raped by her own father and the drama follows how this affects both her future relationships with men and her mother.

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24 year old Wan Xiao Nan is an ordinary girl. She doubts if she'll ever find her ideal type. One day, a little boy took her to a blind box shop. It is said that her dream can be fulfilled through these blind boxes because the toys come to life the next day. Each guy is different where some are: cultured, overbearing, and more. During this time, she interacts with them and finally understands what she wanted through these experiences.

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He Xuemei (Huang Biren) is a senior prison officer. As she is known for her stern demeanor and authoritative manner, the prisoners nicknamed her “Tigress”. Someone just has to shout “Tigress is here”, and everyone will put on their best behavior to avoid being marked by “Tigress”. However, behind that steel veneer is a heart of gold. She cares about the prisoners, and often encourages them to improve themselves so that they will be able to earn a living upon their release from prison. Occasionally, she also helps them to resolve their personal problems. Chen Kai (Yao Wenlong) lost his wife in the early years of their marriage. He is sapped juggling between managing his career and raising four children, Huixin (Julie Tan), Haowei (Ian Fang), Haolian (Aloysius Pang), and Huiyan (Bonnie Loo), who differ markedly in character. Much as Chen Kai would like to be a good father, he is drifting apart from his children. Xuemei does not mind that Chen Kai is a father of four. Neither is Chen Kai put off by Xuemei’s self-deprecating remark that she is “not pretty, not gentle and not thoughtful”. The two of them hit it off and decide to enter into a relationship with marriage in the cards. The four children resist Xuemei’s intrusion into their lives and are determined to join hands to fend off “the invasion of Tiger Mum”. In the end, will Xuemei the “Tigress” win the children’s hearts? Will her relationship with Chen Kai receive their blessings?