In the comics collected in Who Rules the Night, a new Batman rises after the crippling of Bruce Wayne in Part One at the hands of the venom-addicted supervillain Bane. I won't spoil who the new Batman is, but he's a lot more violent and ruthless than Bruce Wayne was, which concerns Robin. The story mainly follows the rise of the new Batman and his attempts to restore order in Gotham. Several of the criminals that escaped Arkham Asylum in Part One have not yet been captured, and it's up to the new Batman to bring them in and wrestle Gotham out of Bane's control.
I really enjoyed Part Two, possibly even more than Part One, but where the art in the comics collected in Part One was relatively the same in terms of quality, the art in this collection was uneven. It absolutely dropped off a cliff with Showcase '93 #7 (2-Face - Double Cross) and Showcase '93 #8 (2-Face Part Two - Bad Judgment), two comics about Two-Face. Though these comics contain the Two-Face origin story, which was not only cool to see but pretty different than Christopher Nolan's origin story for the same character in his film The Dark Knight, I found the art in those books to be quite bad; the quality was very incongruous with the rest of the collection. The contrast was so stark it made these comics seem like they didn't even belong in this collection.
Also, there always seems to be something slightly annoying pervading each volume/collection. In Part One, it was Bruce Wayne's Batman whining all the time about how tired he is. In Part Two, it's Robin whining all the time about how the new Batman is crossing the line and going too far, not doing things in the "Batman way", etc. Uneven art and whiny Robin aside, I loved this collection and can't wait to read the final installment, Part Three.
Highly recommended!