The Great Fire of London gets an hour-by-hour reconstruction, tracking the blaze from a baker's shop near Pudding Lane to the warehouses along the Thames and finally into the packed streets inside the city walls. Historian Dan Jones walks the fire's actual path, pointing out where landmark buildings stood before they burned, while Suzannah Lipscomb digs through archival records to identify who got blamed for starting the disaster and who quietly escaped suspicion. Engineer Rob Bell heads to Imperial College London to recreate the physics of the fire, testing how quickly timber-framed buildings packed close together could generate the kind of heat that melted metal and reduced whole neighborhoods to ash. The film treats the fire less as a single event than a chain reaction, showing how wind direction, building materials, and a slow initial response turned a bakery fire into a catastrophe that leveled most of London within the walls, with property losses the film puts at £37 billion in modern terms.