Over the centuries, the thieves, assassins and secret agents who operate within the underworld have come up with many ingenious devices for stealing and murdering, many of which are disguised well enough to be carried in plain sight.
The city was cursed many years ago. Since then it has not stopped raining. The gutters are inhabited by eels and the doors are on the first floor, coated with pitch. On a bad day, you can see the water level rise above the ground floor windows. Carts have both wheels and bladders filled with air to keep them afloat. And yet everyone is surprisingly dry.