Jane "Frosty" Foster returns to recruit help for tracking down another artifact the Phaistos Disc, which can help unlock some of the secrets of the Piri Reis Map. This adventure goes international, taking the runners to Hamburg, Europort, and Frankfurt, and bringing them in contact with organized criminals, law enforcement authorities, Aztechnology security forces, and arcanoarcheologists.

Darkest Hour is a complete adventure that continues the Dawn of the Artifacts storyline but can also be played alone. Some of the powers behind the search for the powerful artifacts make themselves more visible as the conclusion of the hunt draws near.