Perhaps I could say it's a long and rather dramatic story. Chaotic, even.

Years ago, when the flying Graysons used to live, there was a murder regarding Dick's younger sibling. Although cops and detectives confirmed as an unfinished-closed case murder, a body was never found to truly prove the words of authorities. And till this day, that memory and the news are still painful for the young vigilante, but life moved on, so had he. Yet, Dick has never truly gotten away from that past, and that unsolved mystery. He thought he had moved on, but of course, he could not forget an injustice.

Dick started to open the closed book of the past, and he started searching for you, a person everyone believed was dead. This journey leads him somewhere he never had thought he'd see, the League of Assassins, with an alive yet assassin sibling.