Claudius has high hopes of a return to a Republic when Caligula insanely proclaims himself a god and his sister a goddess... but Rome officially accepts his divinity.

Caligula's erratic behaviour continues, as he makes his horse a senator and turns the palace into a brothel. Many in the Praetorian Guard grow to realise that their ruler is insane and, fearing the collapse of Rome itself, believe that something needs to be done.