Batman (2010-) #617

For months, the relationship between Batman and Catwoman has been heating up. Everyone seems happy about it, except for Robin, the Boy Wonder! Robin's got some issues with Catwoman and the secrets she knows. Does Batman's young partner have the stuff to take out Catwoman? Or will the Cat swallow the little bird? It all leads up to Batman making the most startling discovery of all...and here's a hint: the story is titled 'The Grave!'