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During the Tang Long period of the Tang Dynasty, Li Longji (played by Ma Junwei), in collusion with his aunt, Princess Taiping (played by Chan Wai), launched a coup and executed Empress Wei (played by Michelle Reis) on the spot, who had encroached upon the legal system, to support Prince Li Dan's return to the throne. The seemingly peaceful Taiji Deep Palace is actually full of undercurrents... In the imperial court, the world was in turmoil. Li Longji

This drama is one of the TVB program highlights in 2012. Senior Inspector Xiang Rong (played by Miu Kiu Wai) of the Drug Investigation Bureau's Operations Unit is a man of deep hatred for evil. He and Senior Inspector Wei Sai Lok (played by Lam Fung) of the Intelligence Unit are both mentor and friend, working closely together to solve many drug cases for the police force. During a drug enforcement operation, Shi Le discovered some clues.

Ding Xiaojia (played by Cecilia Cheung), who comes from the lowest rung of Hong Kong society, returns to the chaotic Bonham Street as an undercover agent after being admitted to the police force, gathering intelligence for CID Inspector Kang Daoxing (played by Raymond Wong). Little did they know that during the investigation into the criminal facts of the Triad leader You Dafu, Dao Xing was unexpectedly killed. He is here.

Qin Wanshi (played by Qin Pei) is the owner of the Delicious Garden restaurant. After losing to his friend Jin Yishan (played by Wong Chun Wah) in the Chef competition, he couldn't bear the blow of defeat and disappeared from the public eye. The restaurant is run by his wife, Yuan Yuan (played by MDM. Mok), and their daughter, Su Su (played by Carina Lau), with great difficulty. They both believe that Wan Shi will return

During the reign of Emperor Zhenzong of the Song Dynasty, the intelligence organization Golden Dragon was secretly organized. It had many outstanding disciples, among whom Zhuo Bufan (played by Wu Daiyong), Luo Gufeng (played by Ou Ruiwei), and Han Zui (played by Li Jiasheng) were particularly outstanding. The three of them fought through life and death and achieved remarkable feats many times. In order to subdue the Central Plains, Yelu Xiuzhe, the second prince of the Liao Dynasty, also established the Ziwei Mountain Villa, which was led by Zhan Pin Ting (Luo)

Police officer Leung Siu Tong (played by Nicholas Tse), nicknamed "Laughing Brother", successfully completed his undercover mission and was given an important position at CIB. But the general manager Harry (played by Liu Songren) and his superior Jodie (played by Fala Chan) have doubts about the death of his manipulator. During the investigation, they discover that there is something else going on

Princess Shengping (played by Guan Yonghe), the spoiled princess, is intelligent, passionate and active. The emperor had always been worried that she had not yet found a suitable husband, so he decided to marry Shengping to the prince of the Huihu (played by Andezun). Shengping was extremely reluctant and fled the wedding with his maidservant. As a commoner, I came to Changlefang and met the casual Guo Ai (played by Ouyang Zhenhua)

周劍虹（梁朝偉）因母親當年的一段三角戀愛，竟令他出世後不知生父是誰。母親生他時難產而死，他就由兩個父親周榮及鄒有共同撫養。劍虹大學畢業後，先結識女督察謝碧華（翁美玲）及女律師林少文（陳敏兒），兩人均在