It’s late 1923. London is recovering from the trauma of the Great War and is returning to the bustling metropolis it had always been, the greatest city on earth. The discovery of a ruined city deep on the heart of the Honduras jungle sent ripples of anticipation through the archaeological world. The British Museum managed to acquire a consignment of finds and its Mesoamerican department are soon began to study the artefacts. Then, one of the researchers goes missing together with the artefact he was studying. It soon becomes a race against time for the investigators to discover what happened, a race to save London from cataclysmic destruction and unthinkable horror.