A Paris icon in flames. A conspiracy in the Church. Can this determined explorer survive the search for a hidden history?

Renowned archaeologist Darwin Lacroix remains obsessed, proving his theory that Roman's used lava tubes. But he's interrupted by the Pope, who personally requests Darwin's help to retrieve a codex stolen from the Pontiff's private vault. Discovering that the cryptic text points to the long-sought Knights Templar treasure, he realizes a mysterious cave may also solve his own puzzle.

As he digs up a trail of ancient connections, he's shocked to learn the true prize isn't gold but a priceless relic directly connected to Christ. And someone deep inside the Vatican will stop at nothing to recover it…

Can Darwin outsmart shadowy figures willing to kill to claim power?