The Pirate Cats are up to no good again! This time, Bonzo and company travel to Rome in the year 80 CE to the opening of the Coliseum, Rome's largest amphitheater. The evil felines want to world to think that they designed the Coliseum, and they infiltrate the Roman Senate posing as nobility. Geronimo and his friends must expose the cats' plot, all the while taking in historical landmarks and breathtaking moments of history.