An unexpected family legacy. A hundred-year-old mystery. A sinister secret society. When Jack Knight unexpectedly inherits an old family property, he finds himself unwittingly drawn into a deadly mystery dating back to the first world war. For Jack and his partner Jennifer, what starts as some simple research into their family history soon becomes a dark and dangerous adventure to uncover the hidden secret of his family's legacy. Soon, they find themselves threatened by a sinister secret society that is determined to let no-one get in the way of their plans, and they must risk everything to discover the truth. Together, they must confront an ancient evil in order to save themselves - and possibly all of mankind.