Flight of Vengeance

Part 2 of the Flight series:
Years ago, when Dick Grayson was still Robin, an unidentified associate of Scarecrow's targeted Robin for unknown reasons. They escaped Batman's clutches, and were never caught, but what happens when the associate comes back years later and attacks Nightwing? Damian, Tim, Jason, and Bruce will do whatever it takes to protect Dick, but at what cost?