A relic could be evidence of a Viking settlement in America before Columbus.
The man accused of forging evidence of Vikings in America is investigated. Peter and Elroy visit Elroy's cousin, who has a skull that may be related to the Viking Stone mystery.
The team soon realise they need to find more metal artefacts to support their case. They get in touch with Bob Voyles, a mysterious man who says he has something very important to show them.
Scott Wolter calls Peter and Elroy saying that there is a new scientific test that can be made to verify Olof's innocence but he cannot get access to the runestone core sample.
Peter, Elroy, and Bob have been setting up an archaeological survey at their most promising site but right as they are ready to start digging, they receive bad news.
Peter and Elroy manage to get the core sample and they meet with Scott Wolter at a lab to do the very anticipated SEM Scan. After Darwin's tip, Peter and Elroy go back to the rune stone park together.
Peter and Elroy join in an archaeological dig on Runestone Hill.
The archaeologists investigate charred wood remains at the original discovery site. Peter and Elroy compare Olof Ohman's hand-copied rune text to the text on the runestone. Peter and Elroy ask Scott to perform geologic tests on a whetstone found deeper in the ground beneath the runestone.
Peter, Elroy, and Sturla visit the coast and islands of Maine to view possible Viking trading sites.