In this reimagined reconstruction of Gore Vidal's original script for Tinto Brass' notorious 1979 erotic history lesson, the complete performances of Malcolm McDowell and Helen Mirren are built from a staggering 96 hours of never-before-seen footage. After the death of the paranoid emperor Tiberius, Caligula, his heir, seizes power and plunges the empire into a bloody spiral of madness and depravity.