Abraham lincoln's death has been the greatest loss in American history. Although the murderer John E. Walker Booth was found out immediately, the diary found in his residence was inexplicably missing 18 pages, adding a mysterious veil to the already clear case. The most puzzling thing is that 100 years later, a page of 18' s missing diary suddenly appeared, and scholar Jeb Wilkinson interpreted some ambiguous words as assassination information. Unfortunately, everything in this diary seems to point out a fact: Ben's great-great grandfather is probably the real planner and mastermind behind Lincoln's assassination, and the Gates family has a prominent position.
In order to prove that his ancestors were just decoding a treasure map, not murdering the president, Ben found his old partner Riley Poole, who was entangled with the IRS, and went to find the legendary "Golden City" with his father Patrick and his girlfriend Abigail, who didn't like each other, and cleared his great-grandfather with facts. However, too many clues were scattered, which made them come to London from Paris and even sneak into the Queen's private living room in Buckingham Palace. However, they finally returned to the United States, where it all started, and even kidnapped the president, just to see the "secret book" that only the president himself could read and record.
Worst of all, Ben also alarmed his mother Emily, a famous old English scholar, and Emily never said a word after a fierce quarrel with Patrick about the focus of treasure hunting 32 years ago. This equally thrilling journey not only helped Ben and his companions find the truth they wanted to know, but also discovered the most precious secret relics in the world.