Caligula (Gaius Julius Caesar Germanicus) was the third Emperor of the Roman Empire known for supposedly sleeping with all his sisters, executing landowners to take control of their lands, closing granaries to cause starvation and taking the wives of his senators and putting them into brothels (when he wasn't killing their children). Also, he reputedly had conversations with the moon and adored his horse so much that he was going to make it a member of the Roman Senate.
Vlad, a soldier during the reign of the Ottoman Empire, is turned into a vampire and must grapples with the demons of his new existence.