Having found the Board of Fire, Jenna and Simon hurry to decipher the clues that will lead them to the Board of Earth--and mastery over the very land itself. But on their way to locate the tomb of a mythical English hero while fending off shadowy new attackers who want the Boards for themselves, an offer of help comes from a surprising source.
From the searing desert of the Middle East, Jenna and Simon travel to the ancient city of Pompeii, following the clues to the hiding place of the Board of Fire. But Peraud is hot on their trail, and is more determined than ever to claim the two Boards the Keeper already possesses
Having mastered the first Board, Jenna travels to Jerusalem to find the Board of Water, accompanied by Simon Monk, who seeks the Boards on behalf of the Vatican. Jenna doesn't trust Simon, but he's her only source of information about the Boards.
After the death of her grandfather, nineteen-year-old Jenna Solitaire finds an ancient wooden board hidden away in the attic of his house. The board fascinates her―and scares her―at the same time. As does Simon Monk, the handsome stranger who has come into her life, claiming to know about the board. Even more frightening is the voice whispering in Jenna's head, calling her "Keeper."