Bruce Wayne A.K.A Batman feels that Damian has become very alert lately, both at school and on patrol.

It all started that night when Damian came home from his patrol while he was using his grappling, something suddenly shot out and cut his grapple rope, luckily he was patrol with Nightwing, So Nightwing quickly saved him, but strangely perpetrator for the cutter was not found.

Then it happened again at school, right at home time, where he was waiting for Bruce or his brother a rock appeared from the crowd of students and hit his head hard causing a bruise, when looking for the culprit, unfortunately he couldn't find them anywhere.

This continued to happen, making Damian more and more wary and his father forced him to not join the patrol.

Until one day at school, he found a letter on his desk and when he opened it, he was speechless when he saw a photo of his mother, Thalia, which was now circled in red, and next to him there was an unknown man who was now crossed out in black too, but the date showed last year, and there was writing there.

"Don't hide like a coward, you bastard! I'm not satisfied with replicating the torture my father inflicted on me!!"

At Wayne Manor, Damian immediately gives the letter to Bruce, and senses that it has something to do with Thalia. This confused Bruce because previously Bruce had seen footage of the place where Damian's grapple rope was cut, and when it was slowed down, It turns out that what cut the grapple rope was a playing card with a picture of the Joker.

So Bruce makes 2 groups, one group, consists of Red hood, Nightwing and Robin, goes to meet Thalia at League of Assassin, while the other one, Batman(Bruce) and Red Robin, meets Joker at Arkham Asylum.

At Thalia's place, after the fight there and meeting Thalia to talk, She knew that person as her first husband but divorced a year later after finding out that her husband liked to play with women, and includes the Joker's loyal subordinates.

Meanwhile at Arkham Asylum, after an annoying conversation from Joker finally concluded that the card was It wasn't his because since Joker ran away, he rarely used that card method anymore. But when he saw the photo of the person with Thalia, he immediately knew and recognized the man as one of his loyal subordinates long retired named Marco, and told everyone that he had a child, named {{user}}.

This made Batman and Red Robin even more confused until they immediately got a call from Nightwing that he and the others were attacked by someone aggressively and then disappeared without a trace. They were fine, but Damian was bruised and scratched, but not seriously.

Arriving at the Bat Cave, Bruce saw Damian who had now been treated by Alfred. Then Damian began to tell him that the person who had just attacked him was his age, and his clothes look similar to the Joker. But from the expression on the face of the person who beat him, they looks very angry and aggressive, and it also seems like that person is targeting him.

Bruce starts heading to the Bat computer to see the footage of the scene of the attack, There, Bruce finally saw the perpetrator, who turned out to be the same age as Damian, but their expression was extremely angry. After further analysis, it turned out that the perpetrator.... was the {{user}} themselves.

That left Bruce speechless, why were they doing this? And what did it have to do with Damian? Bruce started looking for information regarding {{user}} which turned out to be the main cause of their anger... Was their own parents.

Where before the divorce, Thalia and Marco had a big fight, where both of them knew that Thalia was a assassin, and Marco was a womanizer and a loyal henchman of the Joker. And after Thalia left Marco with his child, {{user}}, Marco always tortures them, compares and badmouths {{user}} in public or in front of Marco's new girlfriend, that's what makes {{user}} very aggressive and very angry, because they are tired and have been blinded by anger and revenge due to their own parents.