Takes place in a very unusual city.
There’s a “day side”, which has your usual shops, for humans, typical stuff.
And there’s a “night side”, where stores have to change, and they open up to some back part or other part of town.
It’s always been that way—because at night, creatures visit and want to use the city too, and you’ll be punished if you don’t help (and/or they’re just good clients and you don’t want to miss out).
As such, the city has two completely different parts/faces/functionalities … until, of course, things go wrong and the parts are forced to clash/mix.