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Peter and Elroy are starting their archaeological excavation at Runestone Hill. They also meet Darwin who takes them to the cemetery where his grandfather is buried.

While the excavation continues Peter and Elroy go back to their investigation to clear Olof’s name. They meet a Native American professor who gives them some new knowledge about the history of the area and his tribe.

With many new clues to follow, they head to the East Coast to take a closer look at engravings that may provide more answers. They also meet the historian Sturla Ellingvåg, who takes them on a boat trip.

Finally they get to see the famous Maine Penny and the visit to the Maine State Museum opens their eyes to new possibilities. Afterwards they meet the anthropologist Harald Prins.

After an intense search for more hard evidence, Peter and Elroy choose to go in a different direction with the investigation. Each object leads them deeper into a web of mysterious symbols and conspiracies.

The East Coast adventure is coming to an end. Peter and Elroy reflect on what they have found and learned along the way, while a new plan begins to take shape.