This time, Bonzo and his devious cohorts travel to Rome, Italy in the year 80 AD to the opening of the Coliseum, Rome's largest amphitheatre. The first part of the evil felines' sinister scheme requires them to infiltrate the Senate by posing as nobility.
Geronimo Stilton travels back in time to try and stop the Pirate Cats from infliltrating the Roman Senate and taking credit for building Rome's largest amphitheater, the Colosseum.