After the Great War, Enclave President Thomas Eckhart unleashed all manner of horrors on the people of Appalachia in his mad desire to gain access to the region’s Nuclear Silos and finish the war with China, once and for all.

But, when you live by the sword, you die by the sword.

In 2086, an Enclave Patrol finds itself cut off and lost deep in the Mire...communications with the Whitespring Bunker have fallen silent, and old experiments are turning on their creators.