Armed with the first of the four tower guards, Dinah and Vincent set out to solve the rest of the Mausoleum's riddles, which prove more difficult as the journey progresses. The deceptive puzzles of Bizenghast's Graveyard lead the children to an ancient seaside to stop a drowned girl's murderous rampage. Later, they travel through Bizenghast's early past to rid the woods of a festering plague-carrier. And finally, they come face to face with the mysterious second tower guard, Edrear.
