Travelling to England, Will discovers the text contains a sonnet that holds a series of clues - clues that reveal the book has had a profound effect on the history of mankind. But all the time he is being watched. And as he gets nearer to the final revelation, he and his young family become a direct target for a deadly group of men whose duty it is to guard the library's secret - whatever it takes. However, the truth is too powerful to keep hidden...