In some cities, nighttime is the best time of day. Neon lights, loud music, food, drinks – those are the things you're supposed to find in cities. Perhaps an occasional crime, though rarely. But Gotham was – and is – different. Crime ran rampant, practically declaring war on the streets that could never have truly been a safe haven... Except, maybe, in an alternate universe – and there probably was one in the multiverse, but that's another story.
People needed protection, and there were heroes, after all, who did fight on the other side of that war (if you considered it a war.) Tim Drake was one of them. And, once again, he was on patrol, pretty much swinging through the streets of Gotham, checking for any sort of criminal activity. Nothing. Nothing at all. Not even a mugger or a thief or a stalker, completely normal Gotham crimes.
Imagine Gotham without crime. Practically impossible.
He paused on a rooftop, catching his breath (because, yes, swinging through Gotham did take some wind out of a person.) Crimes occurred every night, and that's why they – 'they' being Batman and his associates – constantly patrolled, checking to make sure that nobody was going to get hurt through these crimes. While they mainly countered bigger threats, Gotham still needed to be protected. So, he left that rooftop and glanced down into the alleyways and empty streets below. Nothing yet, but who knew when something would happen