Since Helen's wall samples failed to reveal what the wall is made of, Christopher, Helen's professor, arrives to help. He is an acclaimed scientist, but also a controversial character. Lars and Christopher are at odds right from the start.
The lab is struggling to identify the origin of the wall. Helen's old geology professor Christopher arrives at the mine to help. He does not get on well with Lars. Axel's conduct changes after a visit to the white wall and at the same time Christopher realizes that the wall is much larger and very different from their initial estimations. Lars's teenage daughter Nicola suspects that her father is having an affair with Helen.
