The investigators have found that the new Fairfield Sanitarium is most unusual. A missing woman apparently resides there as a patient, undergoing strange treatments. The wealthy heir who finances it visits late at night through a secret underground tunnel. What does it all mean? Deeper the team goes into the dark, the more truth they shall find…at a cost.
The cryptic document, apparently written by Dr. Armitage, references a sanitarium, recently built. The patients and staff have secrets worth investigating. There is also a yacht club in nearby Kingsport, which might have information about this strange case. The investigators begin their work, but even a cursory amount of research is not without its risks.
The investigators have solved the mystery of the book only to find a more vexing document-based enigma. Dr. Henry Armitage has produced a letter, seemingly written by him, that he has no memory of writing. The letter warns of an apocalyptic future for humanity, a disaster that might still be averted. The investigators must determine if it is a hoax, the result of a latent madness in Dr. Armitage, or something supernatural. The references it makes are vague yet still connected to Arkham country. The hunt for the truth is on!
A group of investigators from various walks of life to look into the death of two men who die under similar circumstances within a day of each other, victims of a serial killer that stalks New York. As the investigators delve into the mystery, they discover the perils of learning too much…
Obelisk gathers its resources to conduct a War Council discussing the Formorian threat. An unexpected guest arrives and forces its own agenda. Choices are made in this Season Finale!