Mystery and adventure for four young detectives in Ancient Roman times . . .
Emperor Titus wants Flavia and her friends to find a fabulous lost emerald. According to a prophecy, whoever possesses the gem will rule Rome. The mission takes the young detectives on a caravan across North Africa where they face beast-hunters, sandstorms and a mysterious beggar . . .
Can the friends survive the dangers of the desert to fulfil their mission?