Build a movie plot around this: What organization is Ben's ancester accused of being part of? A plot to kill the president
Answer:
Five days after the end of the Civil War, John Wilkes Booth and Michael O'Laughlen, both members of the Knights of the Golden Circle (KGC), enter a tavern and approach Thomas Gates to decode a message. Thomas recognizes the message as using the Playfair cipher and begins to translate it. While he does so, Booth leaves for Ford's Theatre to assassinate President Abraham Lincoln. Thomas solves the puzzle and realizes the men are still loyal to the Confederacy. A fight breaks out, and Thomas rips several pages from the diary and throws them in the fireplace. Thomas is shot, and the gunman retrieves only a page fragment.Over 140 years later, Ben Gates is telling his great-great-grandfather's story at a Civilian Heroes conference. Black market dealer Mitch Wilkinson shows one of the 18 missing pages of John Wilkes Booth's diary, with Thomas Gates' name on it, convincing everyone that Thomas was not only a conspirator, but the grand architect of the Lincoln assassination. Ben sets out to prove the innocence of Thomas.Using spectral imaging, Ben discovers a cipher pointing to Edouard Laboulaye hidden on the back of the diary page. He travels to Paris, where he finds a clue engraved on the torch of the scale model of the Statue of Liberty, referring to the two Resolute desks.Ben then heads to London to look at the desk at Buckingham Palace with the help of his friend Riley Poole and estranged girlfriend Abigail Chase. From the Queen's desk, he obtains an ancient wooden plank.Meanwhile, Wilkinson broke into Patrick Gates' house and cloned Patrick's cell phone in order to track Ben's whereabouts. Wilkinson eventually obtains the wooden plank, but not before Ben manages to photograph the symbols carved into the plank.At Ben's insistence, Patrick reluctantly asks his ex-wife and Ben's mother, Dr. Emily Appleton, for help in translating the symbols. She does so, but points out that some of the glyphs are partial, leading Ben to conclude that another plank must be hidden in the other Resolute desk located in the Oval...