March AD 80.
In Rome, the Emperor Titus has announced that there will be a hundred days of games to open his new amphitheatre (now known as the Colosseum).
Flavia, Nubia and Lupus take this opportunity to go to Rome and search for their missing friend, Jonathan.
Their search leads the young detectives straight to the games, where they must face wild beasts and gladiators to accomplish their mission.
