Set in the 1930s, “Fortress Besieged” follows the misadventures of Fang Hung-chien, a bumbling everyman who wastes his time studying abroad, and secures a fake degree when learning he has run out of money and must return home to China. Fang was the son of a country gentleman. A marriage had been arranged for him while at university, but the intended wife died before he could see her.

Young girl Chu Chu came from a family of coroners. She meets Prince Xiao Jinyu, a dignified prince in charge of criminal lawsuit who appeared weak and sickly. Prince Xiao lacks reliable manpower to investigate case, while Chu Chu lacks people to stepup, take charge and be a man. Together, they manage to unravel a shocking case that has dragged on for 18 years. After solving the case, she won the Emperor's approval and is finally certified as the Imperial Coroner, fulfilling her life goal.

Gao Liang and Gu Yi Ye are good friends and rivals since they joined the army. They fall in love with the same girl, Jiang Nan Zheng. However, Gu Yi Ye eventually gives up his love in the name of friendship and marries A Xiu, the daughter of their old squad leader who died in a war. As time passes, Gao Liang not only stays true to his heart but also shoulders the duties and mission of a soldier. In 2003, Gao Liang and Jiang Nan Cheng got married and formed a happy family. In 2008, Gao Liang, who returns from further studies in Russia, was transferred to be the acting brigade commander of the Blue Army because of an observation report.

Wu Si tries to make a high budget independent film and gets into a great contradiction and confusion.

Chang Zheng, the vice captain of the criminal police brigade, is investigating a shooting case in a suburban villa and locks up the suspect Zhao Pengxiang. The second child of the Zhao family, an inspector who didn't want to be involved in the death of Zhao Pengcheng, then becomes a wanted criminal. With the help of a secret investigation team dispatched by the Ministry of Public Security to investigate the truth, Chang Zheng not only faces confrontation with his relatives and loved ones, but also discovers his real identity. In the end, he discards his affection and chooses justice, and cooperates with the secret investigation team of the Ministry of Public Security to arrest the criminal.