Cassandra Cain is dealing with her new ability to have inner dialogue and understanding others.  This is a progression of the character for sure.  However, this new power has limited her almost flawless combat skills: Predicting moves of the opponents before the opponent even flinches.

Batman, still distraught that Cass may have killed when she was a child is just something he can't let go, so he travels across the globe to do his own autopsy on how the gentlemen who is now dead, actually died.  

Quite an intense story.