10 Mar 1914
David McCullen, Mr. White and Mudiwa meet for the first time, in a mutual visit to the Kerguelen archipelago in the Southern Indian Ocean.
In that remote corner of the world, they come in contact with a murderous cult of worshippers of the God of the Black Stone, an otherworldy entity put to torpor at the depths of prehistory and only reawakened two centuries ago. A meeting with a german occult society expedition informs them of the terrible truth of the God's cycle of awakening, demanding a sacrifice every thirty years to ritually bind the being back to slumber.
The investigators, being the sole survivors of the incident, take it upon themselves to continue the Black Stone society's legacy into the 20th century.