Everything seems to be going well for Danny, Robin, and the rest of the titans but what happens when the evil older self of Danny, Dan Phantom, returns. How will Robin and the Titans react if they find out who Dan really is? Will Danny be able hide his secret or will the titans find out? Will they still want to be friends with him? Will Danny and Robin be able to keep their relationship or will their brotherly bond be broken? Find out in "Familiar Darkness" the sequel to "Brothers Again".