Rome 37AD. The emperor is dying. No-one knows how long he has left. The power struggle has begun.

When the ailing Tiberius thrusts Caligula's family into the imperial succession in a bid to restore order, he will change the fate of the empire and create one of history's most infamous tyrants, Caligula.

But was Caligula really a monster?

Forget everything you think you know. Let Livilla, Caligula's youngest sister and confidante, tell you what really happened. How her quiet, caring brother became the most powerful man on earth.

And how, with lies, murder and betrayal, Rome was changed for ever . . .