Langdon has accepted to let Katherine join his quest with the secret Peter entrusted to her to destroy after his death. They are pursued by the CIA, but helped to hide in the tunnel system by Warren Bellamy, the Architect of the Capitol, who reveals being a member of the Leviathan, a secret Freemason sect whose cross symbol occurs repeatedly. They also retrieve from hospital wounded but recovering Capitol Police officer Alfonso Nuñez and recover Peter Solomon's ring to decode a Hebrew passage that Solomon left in hopes of finding answers. The CIA locate the group but Bellamy allowed Langdon and Katherine to escape. Mal'akh contacts Langdon, warning him no longer work to with Katherine, or else. Peter awakes one-handed, learning his captor -Leviathan-tattooed- was behind his bitterly estranged junkie son Zachary Solomon's death in a Turkish prison, escapes but collapses on the road and is picked up.
—KGF Vissers