Dan Brown's The Lost Symbol

Professor Robert Langdon's friend and mentor, Peter Solomon, director of the Smithsonian, has been kidnapped. At the demand of Peter's mysterious abductor, Mal'Akh, to save his missing friend Langdon must to go on an esoteric journey to find an ancient portal. Peter's daughter Katherine, who also happens to be Langdon's ex, joins him on the quest.

Langdon and Katherine encounter Peter's Freemason friend Bellamy who agrees to help them. Thinking Peter's ring holds the decryption key for the Bible page, they seek out the help of Nunez hoping he can get that they need from into the evidence room.

Sato confesses to Bellamy that she was Zach's CIA handler. On their hunt for the capstone, Langdon and Katherine instead find a mysterious, old 16mm film of the man that Bellamy spoke of. Peter, still in the Araf, experiences the death of his son, Zach, at his own hands. Nunez finds the body of Trish, who has been murdered by Mal'akh to send a message to Langdon, Don't disobey me again.

After recovering the capstone, Langdon is rescued by Nunez at Wiggington Quarry. Katherine receives what she believes to be a psychic message from her father, giving her proof of life, as well as much needed motivation to fight on. Sato receives more information about the man she believes to be Mal'akh and teams up with Katherine, but her true loyalties remain in question.

When Mal'akh sends a disturbing video of Peter, Langdon has no other choice but to reunite with Katherine and team up with Sato for a bold move. Nunez follows a hunch.

After being captured by Mal'akh, Langdon is reunited with his mentor, Peter. Katherine tracks down Mal'akh's lair by rewatching Peter's hostage tape. In the process of escaping with Langdon, Peter realizes Mal'akh has been Zachary this whole time. He shares the information with a shocked Sato. To avoid being caught, Mal'akh jumps off a cliff to his presumed death.

While in CIA custody, Sato interrogates Mal'akh to find out how he evolved from Zachary Solomon to the monster he is today. In flashback, Zach learns Peter and Bellamy are indeed working towards his release, but when his new mentor finds out, he beats him and leaves him for dead. Transformed, he gets plastic surgery and covers his body in tattoos, finally becoming Mal'akh.

Still reeling after learning that Mal'akh is actually Zachary, Langdon and Katherine rush to warn her mother Isabel. But they're shocked to find out that not only did she already know, she's been his mysterious benefactor all along. When Mal'akh finds out his mother has warned the pair to run away from him, he kills her in cold blood, showing yet again just how far gone he's become.

Katherine, Langdon and Peter decide the only way to beat Mal'akh is to continue solving the clues so they can release the wisdom to the public. They work on a plan to outsmart the CIA with a newly healed Sato. Mal'akh is also two steps ahead, sending a double in his place to be captured by the CIA. But little does he know, his old mentor Samyaza is hot on his trail.

As Mal'akh's plan enters the final phase, Peter and Langdon wrestle over the sacrifice needed to save Katherine, and Nunez and Sato race to understand the weapon known as Cascade.