It is London 1665, a year fraught with strange and unearthly events. Comets fly low in the sky while merchants clamor for war. Eleven year old Erasmus T. Muddiman attends St Paul's School with his younger brother. He enjoys Latin but hates to create Latin verses, preferring the new sciences as seen at the Royal Society. He plays football with the lads in Paul's Yard, shimmies up the drainpipe outside his bedchamber window and he saves his brother, Desiderius, from all sorts of scrapes. Soon, Erasmus cannot avoid the rumors of war. Men and boys are pressganged, taken to ships or the dockyards. Plague enters the city. As school fellows disappear, Erasmus and his family meet a terrible fate of survival. Who will live and who will die?