Zero Year is done and come back to the present day where a new serial killer is hiding within Gotham, preying on the meek.
The Spoilers:The story is simple, there's a killer who is targeting the patients of Leslie Thompkins for unknown reasons. Bruce warns Leslie of this and tells her to do the same for her patients, but neither of them know why she or her patients would be a target, nonetheless, Bruce follows his only lead, footage of a red pickup truck near the latest abduction.
After failing to stop the killer from getting to his next victim, Bruce uses a dog that was nearby to track him to the next crime scene, where (I guess) it's confirmed the killer is after Thompkin's patients, as medication prescribed by her is fond on the scene.
Leslie seems to be the next target of the killer, and as she's being attacked, she asks why he's doing this to her and her patients. Turns out this guy isn't like Gotham's normal killers. He doesn't want to be noticed by anyone, especially the Bat, and he wants to prey on those like him, the meek, the forgotten.
Unfortunately for him, it's not actually Leslie Thompkins, but Bruce in a disguise with the EMP mask, and it doesn't take much for him to overpower mister Meek. When the confrontation is over, the real Leslie exits the Batmobile and is told why she/her patients were being targeted.
Bruce brings Meek to Arkham, and has a request for a Dr. Border (I bet he'll play a part in Arkham Manor), one thing leads to another, and the Meek is put into the Joker's old cell, which is the ultimate punishment for the killer, as no one will forget the man who was put in the Joker's cell.
Later, Batman meets Bullock at the cite where Meek buried his victims. Not much was known about him other than the fact that he was an off the books grave digger. Harvey doesn't want to stay around and see all the dead bodies unearthed, but Bruce makes sure to stay so none of them are forgotten.
Also, it's clear that Joker's return is being seeded. I think it's going to be the arc after Endgame, but who knows... He's definitely coming back, though.