Release Message:  In Qing Dynasty during a ship departure, a woman named Lui Sei-leung approaches Yongzheng Emperor and thanks him for a kind deed. She reveals herself to be a Ming Dynasty revolutionist and attempts to kill the emperor. The boat is then all of a sudden caught in a time-traveling vortex/hurricane. When they wake up, they are both warped to modern Hong Kong in 2003.

Description:  The story begins in Qing dynasty, China with Yongzheng Emperor disguising himself among commoners to have a meal outside the imperial courts. At the restaurant he encounters a woman named Lui Sei-leung who was under attack by loan sharks for not returning debts. The emperor comes across her situation, and pays off the debt for her. Later during a ship departure, Lui approaches the emperor and thanks him for his deed. She suddenly reveals herself to be a Ming Dynasty revolutionist and attempts to kill the emperor. The boat is then all of a sudden caught in a time-traveling vortex/hurricane. When they wake up, they are both warped to modern Hong Kong in 2003. The assassin continues her mission to assassinate the emperor in the city, only to find out that he became a commoner and impersonates Lee Dai-ha (literally Big Shrimp Lee). The emperor is somewhat fascinated by the bermuda triangle and was looking for explanations of his time travel. They also learn about the fall of the Qing dynasty including the rise of the 1911 Xinhai Revolution and founding of modern China through a historic TV video, which also mentioned the emperor's death was shrouded in some mystery. Both the emperor and the assassin encounter difficulties with HK daily life, culture and society. They both end up working in a company that sells kitchen tiles. The emperor and the assassin often find themselves collaborating to deal with opposing co-workers who dislike them. The emperor later fell in love with Rachel, the office worker. The story then becomes a more romantic drama, as the assassin also falls in love with him. She feels there is a special connection between them since they both were from the same dynasty. They end up living together with a host of other characters. The show also contains mini plots such as Ko King getting accused of carrying illegal drugs in a club, Hugo and Kenneth's homosexual relationship, and many other side stories. The King of Yesterday and Tomorrow tells the tale of the Qing Emperor Yong Zheng (Kwong Wa) and Lu Si Niang (Maggie Cheung Ho Yee), a female assassin who is determined to kill the Qing Emperor in order to revive the Ming Dynasty. They are accidentally transported to the modern day Hong Kong from two hundred years ago. At first they feel shocked, but soon they realize that they have no hope to go back to their own era, and learn to adapt to the new environment. Yong Zheng coincidentally assumes the identity of contemporary Hong Kong man. Lu Si Niang, on the other hand, is still bent on assassinating him no matter which era she is in. However, sharing the miserable experience of a mysterious temporal displacement finally draws them together. She discovers that he is not as bad as she has thought, and surprisingly, she even falls in love with him! On the other hand, Yong Zheng also has a crush on Shum Yat Oi (Melissa Ng) while working in her father's company. How will the three resolve the love triangle? And can the two historical figures get back to the era they belong to? The drama shared with the famous Square Pegs to become the drama with the highest ratings in 2003. Maggie Cheung was crowned Best Actress in TV dramas for her hilarious performance. Her role as Lu Si Niang was also voted "Favorite TV Character", and so did Kwong Wa's role as the emperor. Similar to the hugely popular A Step Into The Past, The King of Yesterday and Tomorrow also talks about time traveling and combines history with modern technology with just the right balance. Apart from the actors' captivating performance, the parallel between ancient imperial court and modern day battlefield is equally impressive.