Twenty years after The Great Purge and the continuing effects of a High Priestess’s curse, Albion is a nation on the brink of collapse. Not even High Chancellor Uther Pendragon’s Compatibility Regime can curb the plummeting population. To add to his troubles, his wayward son, Arthur, makes no disguise of his unwillingness to wed. With good reason. Arthur is secretly leading the Movement, a covert organisation plotting to overthrow the government and return magic to Albion. Not to mention, it’s been foreseen that Arthur’s future, his destiny, is an indomitable union with a warlock—not marriage to the farm-boy matched to him by Uther’s Compatibility Machines.

The Avengers discover that there are fans who write explicit RPF fic about them. Some of them are very confused. Some are proud. Some don't understand why everyone writes the pairings who aren't together but hardly anyone writes the couple who actually is together. Much silliness ensues.

The best thing about “trade negotiations” is that no one is ever likely interrupt them.