The backdrop of the show is the fictitious 'Chow Kei's Cafe' (周記冰室) located in Wanchai.
The protagonist is the owner of the cafe, ‘Boss Chow’, and along with his employees and regular customers, they offer their differing views and opinions on the various current affairs and social issues of Hong Kong in a friendly manner.
In this way, the show serves as a microcosm of Hong Kong's society at large.
The schedule of the broadcast is on Mondays through Fridays from 12:36 - 1:00 pm, and has remained largely unchanged for decades.
At first, the name Eighteenth Floor Block C came from the Hong Kong 1967 Leftist riot where Hong Kong Commercial Radio's anchor Lin Binsheng lived, in Waterloo Block D. Commercial Radio's founder George Ho (何佐芝) came up with the programme's name but when was asked how he simply said "I can't be bothered explaining" ("費事解")