Batman exited the Krank Co. Toys building, and was unsure what to do next. He kneeled down, and grabbed his Cryptographic Sequencer. He was scanning for radio frequencies that could lead him to anything. He kept tinkering with the sequencer for a while, until he found something. He had locked into someones conversation. It wasn't the best signal, but it would have to do.
"Batman froze . . . Clayface is . . . Bane . . . In twenty minutes . . . Meet up . . . Crime Alley . . . See ya then‒" The radio was cut off. It was obvious people were meeting at Crime Alley in twenty minutes. Batman's head rushed with memories, dreadful, despairing memories. Batman was about to head over to the rendezvous point when his comm-link buzzed to life.
"Bruce, I have some news." Oracle's voice rang through their link.
"What is it Barbara?"
"Well, there has been multiple disappearances in Arkham in the past few days. I've been able to somewhat connect them. Every missing person has ended up in the same area. We have traced that back to . . . Crime Alley."
"I was just heading there now." Batman said as making his way over to the Park Row district.
In a matter of minutes he had found his way to Crime Alley.
Batman had made his way to his destination. He stood on the roof above Crime Alley, yet there was no one there. He arrived two minutes before the time when everybody was supposed to meet. He waited it out, and nothing. Five minutes later, after camping out on the roof, Batman spotted a thug below. The thug was looking around, and checking his position and area. It was clear that he wanted to not be seen. Batman watched the thug with keen vision. The thug had stopped checking the area, and had moved towards the wall a few feet away from where the chalk outlines of Thomas and Martha Wayne. The thug then knocked on the bricks in a pattern. The wall made a slight noise and began shifting until it revealed a passage. In a matter of seconds it was sealed once more.
"Hmm, well, that's interesting." Batman muttered to himself.
Batman glided down to the wall. While examining the wall, he was trying to remember the pattern. Batman thought he had the puzzle figured out, and he knocked on the specific bricks. He finished. The wall made the noise it did before, and then opened. Batman crawled inside. He then began to fall. He tried using his Batclaw, but there was nothing to grapple. He fell until he hit the ground gracefully. It was an underground passage. Batman began walking towards a door-like opening in the concrete wall(obviously made by some explosion or weapon.) Batman turned on his Detective Vision and scanned the area before stepping through the over sized hole. There was a bridge crossing over a flowing river of sewage. Batman surveyed the area quickly, and proceeded across the bridge.
"Tsk. Tsk. B-Man, you rodent, you aren't allowed here!" A crazy, fearful voice echoed from behind him.
"Why would you come back to Arkham, Quinn?" Batman asked out of curiosity.
"Jail is no fun! This hell of a city is my place to be! I have nothing left to lose, so why wouldn't I come back here to rule and ruin the lives of these bozos?" Harley Quinn responded in a tone even crazy for her standards. "Well, anyways, you came here at the wrong time B-Man. Now you will suffer!"