It’s a Wednesday night in the dog days of summer. Ah Wai’s taxi, a standard 4-seater Toyota Crown Comfort YXS10, pulls up outside the Canny Man pub on Lockhart Road. The cab’s livery and dashboard ‘for hire’ sign are ablaze with red and its roof light glows a soft yellow amidst the gaudy neon signs of Wanchai. We are taking a road trip into the world of the night shift.