London in 1666 is a city already worn down by plague when fire tears through it. This film tracks the two disasters back to back, opening with the Great Plague of 1665 emptying streets and filling pits, then following the fire that broke out at a baker's shop on Pudding Lane and burned for four days through the medieval city. Historians walk the ground where the Guildhall, St Paul's, and thousands of timber houses stood, using parish records, diaries, and maps to reconstruct how fast the fire spread and how far the plague's death toll had already gone. The film asks what it actually meant to live through both crises in the space of a single year, from the scramble to fight the flames with no organized brigade to the rebuilding schemes that followed, including Christopher Wren's plans for a new London. It treats the two disasters as connected chapters in one very bad year rather than isolated events, using expert interviews and location footage to ground the history in the actual streets it happened on.