Mikkel Jones, famous archaeologist, from "Mikkel Jones and The Raiders of The Lost Book"
(spoiler alert for the movie plot)
Mikkel Jones, a Danish-American archaeology professor and adventurer, recovers a golden idol from a booby-trapped Finnish temple and discovers that he hates giant rocky balls. After destroying the temple and barely escaping, Mikkel is cornered by Kade, a rival that steals the idol and tries to kill him. Mikkel barely escapes again, saved by a waiting seaplane commanded by his brave friend Onni Jock.
After returning to America, Mikkel is told that Nazis are excavating at Denmark, and one of their telegrams mentions his old mentor Abner Ravenwood. Jones deduces that the Nazis seek the Book of The Rash, which Adolf Hitler believes will make their army invincible. The CIA agents recruit Mikkel to recover the Book first, which he accepts as one more job for his already long list.
After a cute animation Mikkel arrives at a bar in Norway where he reunites with Ravenwood's daughter Sigrun, a tough bar owner and his former lover, and learns that her father is dead. The bar is set ablaze during a scuffle with Gestapo agent Arnold Troll, who arrives to take a medallion from Sigrun. Troll attempts to recover the medallion from the flames, but only burns its image into his hand. Mikkel and Sigrun take the medallion and barely escape, again.
Traveling to Copenhagen, the pair meet Mikkels's friends Emil and Lalli. They reveal Kade is assisting the Nazis and fashioned an incomplete replica medallion from the burns on Troll's hand. Nazi soldiers attack Mikkel, that barely escapes again, while Sigrun is seemingly killed, leaving him despondent.
Mikkel is pissed, and teaches some guy why one should never bring a knife to a gun fight.
He finds another nameless guy that deciphers the medallion, revealing one side bears a warning against disturbing the Book, and the other bears the correct measurements for the "staff of Loki", an item used to locate the Book. Meanwhile Mikkel finds that Sigrun is alive and rescues her from her captors before they have time to regret it.
Mikkel, Sigrun, Emil and Lalli realize the Nazis are digging in the wrong location, infiltrate the site and use the medallion and the correctly-sized staff to locate the Well of Ghosts, the Book's resting place. They recover the book, that has a golden, intricately decorated cover, almost as shinny as Emil's hair.
But Kade and the Nazis discover them and seize it. Mikkel and the others are sealed inside the well, but they (barely) escape and manage to recover the Book. Then they have a funny fight around an airplane and, again, barely escape, and yet another funny fight that involves a tank, from which they - you guessed right - barely escape!
They finally seem safe. Mikkel and Sigrun board a steamer ship, under the command of captain Reynir Katanga, that will take them to America.
However a German submarine intercepts the steamer and, despite Reynir's resistance, seizes the Book and Sigrun, while Mikkel barely escapes and covertly boards the submarine. The vessel travels to an island in the Baltic Sea, where Kade intends to test the power of the Book before presenting it to Hitler. On the island, Mikkel barely escapes detection and manages to ambush the Nazis, threatening to destroy the Book, but surrenders after Kade deduces that he would be stupid and never destroy something so historically significant.
The Nazis restrain Mikkel and Sigrun at the testing site as Kade ceremonially opens the Ark. Mikkel has an incredible insight and instructs Sigrun to close her eyes while the Book releases ghosts and bolts of energy that melt Kade, Troll and the assembled Nazis before sealing itself shut.
Mikkel and Sigrun open their eyes to find that they barely escaped again, while the area was cleared of bodies and their bindings removed.
Back in Washington, they meet Tuuri Brody, a museum curator and Mikkel's loyal friend, and she delivers the Book to be the Government, which is of course the right move to do, as we later see in SSSS. The movie ends with the Book inside a crate, being stored in a large warehouse among countless other crates.