If you have read enough comic book history,then you will have no problem following this movie.It starts with Jason Todd's death at the hands of the Joker. Of course,Batman/Bruce has a major guilt problem about this,blaming himself for the demise of his young partner.Sometime later,A new guy pops up,taking down crime in the streets,in a much more volatile way than Batman's.Batman seeks the help of Nightwing,formerly the first Robin,to figure out who this gun toting crime fighter is.I'm going to end this by saying it may be kinda obvious,but it is very cool.Go get it!