London in the 1790s, Europe is in turmoil and war with France is looming.
James Matthews, an Welsh tea merchant and anti war advocate who holds covert meeting with both the English and the French leaders.
But Matthews believes that his mind is being controlled by revolutionary terrorists and a secret machine called the Air Loom.
He is promptly declared mad and send to Bedlam. Here his delusions are celebrated as the most complex and bizarre ever recorded and strangely many of the incredible events he claims to have been involved in are entirely true.