In AD 89 Flavia Albia works as an independent informer from the Aventine Hill. A client's sudden death appears natural until Albia finds a connection with other unexplained deaths across Rome, all occurring without obvious violence or warning.
Her inquiry develops while the neighbourhood prepares for the Games of Ceres and aedile's assistant Tiberius Manlius Faustus struggles with public duties. Albia's relationship with the archivist Andronicus complicates a case in which the killer begins to threaten people close to her.