The sun never sets on the British Empire, but Albion has ushered in an age of darkness. He has neutralized all technology in Britain, reducing the island to a pre-industrial state. His corps of Shadow Captains has cemented his control and now serves as the standing army in his war against Roma and the Captain Britain Corps.

Excalibur is the only hope to overcome this threat, but what chance do they have with a traitor lurking in their ranks?