We Are The Pack

While on the way home from the Land of Waves, Kakashi certainly wasn't expecting an accidental surprise attack from a dog and shinobi pair that act suspiciously like the Inuzuka.
I mean, weirder things have happened, but a band of shinobi with no headbands from any village that know both Zabuza and the Hokage on a first-name basis? And why does everyone except Kakashi himself seem to already know who they are?

A story in which Kakashi quickly begins to question things he never thought he'd wonder about when a strange woman shows up wearing a porcelain mask and leading a group of surprisingly strong shinobi. Sarutobi really needs to start explaining.

Oh, and Zodiacs.