When archivist Dan Turner takes a mysterious job restoring a collection of damaged videotapes from 1994, he finds himself reconstructing the work of documentary filmmaker Melody Pendras and her investigation into a dangerous cult. As Dan is drawn into Melody's story, he becomes convinced he can save her from the terrifying end she met 25 years ago.

Follow-up series to 'Vikings' set 100 years afterward and centering on the adventures of Leif Erikson, Freydis, Harald Hardrada and the Norman King William the Conqueror.