When Roy showed up in the hospital room, Barbara was sitting next to his father.

"I'm sorry I'm late, Director." Roy said, "I just found a little bit of a clue about the Joker. ”

"How?" Gordon asked, but clearly didn't have much hope.

"Ran away."

Gordon sighed slightly, not too disappointed, because this was also expected.

Roy added, "He just led a group of police officers to attack the Gotham Bank, and the Winged Knight caught a few of the officers who were present, but the Joker ran away with a few bags of bills. ”

Both of them were very surprised to hear the news. It's just that Gordon was just surprised and indignant that the clown did such a thing again, and Barbara's eyes were a little more worried.

Roy gave her a "I'm fine" message with his eyes.

Gordon seemed to see the exchange of eyes between the two, and said with a smile: "Okay, although I'm a little old, it's not time to be useless." I'll have no problem here alone, and you can leave with peace of mind. ”

Barbara hurriedly said, "I'm not going anywhere, Dad." You need me now, you need family, and I'm here with you tonight. ”

Gordon shook his head: "What I need most is that bastard to be arrested quickly, and those police officers can be rescued as soon as possible." I know you've been helping this kid solve some cases all this time, and I now believe that he's the one who has a better chance of tracking down the Joker's whereabouts. So, I think he might need help from my baby girl. ”

Barbara was slightly surprised: "You already knew? I thought you would object to me doing this kind of work, which you know, that you think is dangerous. ”

"Silly girl, your father is also a police detective, and my advisor often asks my daughter and his roommate for help, do you really know anything about me?"

After sighing again, he said, "Of course I feel dangerous, after all, you are my only precious daughter. But it's safer to sit at home and do logistics than to run around on the front line. What's more, since that three years ago, my bubbly little bala seems to have lost some important part, and as a father, I've been worried. And now, I'm glad to see that when you start tying Roy to do his job, some important pieces are slowly being recovered. This is the most gratifying thing for a father. ”

Barbara stared at her father for a moment and gave her a big hug: "Dad"

"Okay, okay, no need to say it. Don't you still have a dangerous madman to catch? Gordon cupped his lenses and said, "But don't forget, once you two find out about the Joker's whereabouts, don't be stupid enough to go to see him yourself." As I said before, it's dangerous and not something you can handle. Inform Officer Cash that now all the remaining forces of the Gotham Police are in his hands, and that he will know how to contact Batman. Just leave the problem of arresting people to them. ”

Still not at ease, Gordon finally solemnly emphasized: "Promise me that you won't do anything stupid!" ”

"We promise, Dad." Barbara said with a smile.

Roy smiled and nodded, but didn't say anything.

Roy and Barbara didn't go back to the apartment this time, but instead went to the nearby stronghold that Batman had provided them.

Barbara immediately turned on her computer and said, "Okay, I guess, tonight has to be another sleepless night?" ”

There was a "ding-dong" sound in Roy's pocket. He pulled out his phone and looked surprised when he saw the message popping up on the screen.

"What's wrong?" Barbara asked.

Roy frowned and thought for a moment, and said, "When I was at the police station earlier, I found an opportunity to put a tracker on the sole of the clown's shoe. Not long ago, I tracked down Gotham Bank through this tracker, but unfortunately let him escape. Since then, the tracker has run out of signals. ”

Barbara said with a serious expression: "That means the Joker has found the tracker on his body"

"If he can remember that I put the tracker on him when I was in the GCPD, and combined with the fact that the Winged Knight found out about his bank robbery in the first place, maybe he could have deduced my identity. But that's not all, you see," Roy opened the tracking app on his phone and showed Barbara, "and now, the tracker is activated again. ”

Barbara sees Roy's phone screen showing a 3D map of Gotham taken by satellite in real time, with a red dot flashing somewhere on the map.

"If they were previously at a high altitude or in a place where it was difficult to receive the signal underground, it could cause a temporary interruption of the signal." Barbara said.

"Or maybe it's just for another simple reason." "He did spot my tracker and somehow interfered with its signal. Now, he regained its signal as a decoy. ”

Barbara nodded worriedly, and she certainly didn't miss the possibility.

"We have to always be prepared for the worst," Roy said. ”

"Bruce said that, too." Barbara said, "What are you going to do?" ”

"Dress." Roy replied without even thinking about it, "I'm going to meet him." ”

Barbara said nervously, "But you said it was a trap." ”

"Even if you know, you have to go. The Joker has said that he is interested in the Winged Knight, so if he lays out any death traps, there is a good chance that he will choose to be my opponent himself. Or, at the very least, he would have chosen to be there and watch the Winged Knight struggle in his trap. Whatever the psychology, I have reason to believe that he himself may well be in that place. So since the clown is there, of course we can't back down, right? ”

"But"

Roy interrupted her with a wave of his hand, "Don't worry, I'll catch him, I promise?" ”

"You said that last time, too." Barbara worried, "But last time you were almost killed by him." ”

"I know, that's why I'm more careful this time." Roy paused and said seriously, "I'll catch him." ”

The Gotham Water Filtration Plant, where the Joker's tracker signal is emitted. The Winged Knight rode the batmobile to a stop at the huge drain that had stopped working at this time, and got out of the car and walked along the drain pipe himself.

Of course, it's not just about entering here to carry forward the tradition that the Bat House never goes through the main door. Since he felt that the clown might have set some trap here waiting for him, it was naturally the most unwise to enter through the main entrance. If possible, the quieter the better. After Barbara called up the detailed structural drawings of the water treatment plant, she determined that access through the drainage pipes was the most hidden way.

Entering the interior of the building, surprisingly, there was no heavy guard in the infrared imaging, only one person, standing in the metal aisle directly above the clear water pool, as if waiting for him.

Again and again, there is indeed no one. Roy frowned slightly, but walked quickly towards the man.

There is no convenient place for ambush on the side of Qingshuichi, it seems that the other party deliberately chose this place, and the only entrance is only a door directly opposite the aisle, so it is impossible to sneak in without the other party noticing.

Roy pushed the door open and walked down the metal aisle.

The man directly opposite, of course, was the clown, and when he saw him, he waved his arm "friendly": "Hey! Friend! We meet again! ”