This story about assassins takes place in a fanciful world. Yim Mo, who used to have a prestigious nickname “Yama”, has caused his family to break up with fatal consequences due to his blunder. He ends up as a mediocre killer. He has facilitated the emergence of a formidable hitman called Kiu Sing, aka “Zero”. However, the duo’s destinies are rewritten because of a Taiwanese tycoon called Or Ching-hung. Yim Mo counts himself lucky as his buddy Yiu Suk-han, who is a hooker by profession, manages to bridge the communication gap between him and his daughter Yim So-chi. Unfortunately, Yim Mo’s life has become very difficult as an eccentric female assassin called Yik Lan keeps clinging to him. Kiu Sing opens a cafe as a decoy and hires a single mother called Chin Heung-sin. He also has a crush on Lam Sum-sum, who is a temple keeper with a mysterious background. Yim Mo and Kiu Sing are forced to engage each other in a duel as Assassin Hunter shows up.

Nice guy designer Chan Tsz-long and his idealist girlfriend Yau Hoi-kei are a typical Hong Kong couple reluctantly living an unsettled life due to land issues. Tsz-long’s two younger sisters Chan Tsz-yan and Chan Tsz-ting are polar opposites. Photographer Tsz-yan keeps indulging in artist Ki Ka-hei’s decadent paradise. Well-behaved and diligent college goddess Tsz-ting adopts a realistic approach when she finds her first love. Tsz-long and Hoi-kei never miss any job opportunity as they want to have their own love nest. The couple move into a 100-square-foot plus subdivided unit after getting married. They not only have to deal with daily inconveniences due to insufficient space but also need to handle emotional issues of their aging parents on both sides. The couple manage to overcome hurdles. But their property dream turns into a nightmare overnight. Ownership of an apartment has somehow caused them to forget how a loving couple should treat each other.

Jacqueline Wong, a maid in the household of the Vice Minister of War, leads an alliance of maids at the six ministries, who trade information and make money together. Roxanne Tong sold herself to be a maid to raise money for her lover to travel to the capital and take the imperial exams. Jacqueline and Roxanne take care of the Vice Minister's first wife and second wife (Angie Cheung), respectively, and fight against each other on behalf of their mistresses. Jacqueline and the young master fall in love, but they are oppressed by his father. Timothy is demoted after committing an offense. Tony is determined to achieve honors from the imperial exam and restore the family's reputation. Lisa Lau, the daughter of the Minister of War (Pat Poon), sets her eyes on Brian and tries to seduce him. Jacqueline and Roxanne worry that they will lose their lovers if they achieve a high rank in the imperial exams, and vow to ruin their scholarly dreams. As the two pairs of lovers are about to break up, they get embroiled in a treasonous conspiracy.