In the summer of 1705, a masked woman knocked on the door of a London printer's workshop. She did not leave her name, only a package and the promise of protection.

Soon after, an anonymous pamphlet was quietly distributed in the backstreets of the city. Entitled The Memorial of the Church of England, the argument it proposed threatened to topple the government. Fearing insurrection, parliament was in turmoil and government minister Robert Harley launched a hunt for all of those involved. The printer was eventually named, but could not be found...