When Casus sets out to refurbish an antique safe inherited from his great-great-grandfather, he expects little more than aged wood and worn metal. What he finds hidden within changes a trove of thin gold bars, a centuries-old parchment, a covenant, a map, and a signet ring from the days of King Charles I.
Pieces of a conspiracy buried for nearly four centuries, a secret powerful enough to shake the foundations of history. But Casus is not the only one to recognize their value. From the moment of discovery, unseen forces begin to close in, determined to seize the treasure and silence those who stand in the way.
Casus assembles a small circle of family and friends—unlikely investigators thrust into a deadly game of codes, hidden trails, and betrayals stretching back to the English Civil War. Every clue pulls them deeper into a puzzle designed by people who would kill to make it happen, or kill to guard it from happening.