National Treasure: Book of Secrets is a 2007 American action-adventure film and the sequel to the 2004 movie National Treasure. The film follows Benjamin Franklin Gates, Abigail Chase, and Riley Poole as they embark on a quest to clear Gates' ancestor's name in the assassination of Abraham Lincoln. Armed with pages from John Wilkes Booth's diary, they must decipher clues and unravel historical mysteries.