The Great Fire has ravaged London; times are volatile and danger is only ever a heartbeat away. James Marwood, son of a traitor, is thrust into this treacherous environment when his ailing father claims to have stumbled upon a murdered woman – in the very place where the Fire Court sits. Then his father is killed... Determined to uncover the truth, Marwood is forced to confront a vicious killer whose actions threaten the future of the city itself.