She couldn't have made it herself. A solitary bookkeeper, long disillusioned with the "dream job" of maintaining the Canterlot archive, becomes the unwitting guide to a panicked Princess of the Night in the deepest recesses of their voluminous libraries.

Deep underneath the shelves and scroll racks, through the perilous and twisting caverns and gnarled trap-laden corridors, he realizes she isn't just seeking a getaway from the pedantic Canterlot politics. She's seeking to destroy an evil as old as the night sky itself. An evil that...well, she couldn't have made it herself...