Caligola rules Rome shared between his beloved horse "stimulat-i" and his incestuous relationship with his sisters Agrippina, Giulia and Drusilla. During a moment of rest from his orgies he finds out dout a consipracy against him, e orders to the guards to kill the conspirators and to burn their residences. That night of "horrors" he assist delighted with the young Mess-ina to the destruction of the buildings. Intrigues, sex and death represent in a world of oppression and power the leading scenario of this film.