The story is set in 1899, based on an alternate history of the island of Portland, off the south coast of England. You take control of Hito, one of the Knights of the Empire, and head to the Island to investigate reports of a missing royal, and the presence of a rebellious faction called the Sons of Washington. Soon, the Fog descends, leaving you and the islanders to fend off the would-be rebels who have made a pact with entities from the Cosmos.