His father traded him and his brother Vlad the Handsome as hostages with the Turks so they wouldn't attack Wallachia (or...Transylvania. I keep forgetting which.) Anyway, he grew up in a dungeon as a result. His brother became part of the King's personal harem. They let him go when his family was assassinated by that Christian clan. Then he worked for the Turks for a while, became the official King of Transylvania, and he turned against the Turks and got his fucking revenge.