A lost child. A powerful relic. A desperate quest through time. Sophie and Freddy are in ancient Rome, searching for the artifact that can destroy a god and save their daughter. Hugo is there too with Sophie's dog, Charlotte - and so is a hired assassin. Hunted through gleaming temples and sleazy backstreets, they must survive until the Festival of Janus, when the artefact will be in plain sight. But killing a god comes with the ultimate price...