This volume includes three novels in their entirety. In "The Assassins of Rome", Jonathan has disappeared on a secret quest to Rome. In attempting to locate him, his friends must enter Nero's Golden House, and find an assassin. "The Dolphins of Laurentum "involves a a sunken wreck full of treasure which seems to be the answer to the four detectives' woes. But someone else seeks the bounty—someone with a sinister connection to Lupus's past. And in the final story, in order to save her father from a terrible fate, Flavia must perform 12 tasks—just like the Greek hero Hercules, in "The Twelve Tasks of Flavia Gemina".