The capital is in the grip of plague.
The plague has, at last, subsided, but one tipsy baker has slumped into bed.
It starts to look as if Charles II might have his own dark reasons for fanning the flames.
Thomas the baker is on the run and six acres of molten lead are pouring from the roof of St Paul's.
As the flames finally subside, a maelstrom of scandal and speculation flares up.