After the epic battle of 'Wooden Soldiers', fought entirely without alerting the mundanes, Fabletown are forced to consider the Adversary as an active threat once more. The deeper roots of Fabletown diplomacy and espionage are revealed as well. Cinderella, who goes on to her own spinoff series, proves to be more than she seems. There is also some back history of Bigby's role during World War II.
The main arc has to do with Snow White's children and the powers they're revealed to have. Snow brings her children to the farm as they cannot pass for human, leaving Charming, Beauty and Beast alone running Fabletown's day-to-day affairs. Graphic novels usually don't pull me emotionally the way plain writing do, but the punch at the end of this one, with Rose and Snow, Colin's impaled head and Snow, and Snow and her children got to me.