Well, it's a complex period in English history. Henry VIII has died, and after six marriages, left three children (from different wives) to navigate the hugely conflicting religious and political world, while all around them the landed power brokers are scheming for influence.
It's fair to say that without an understanding of the historical backdrop you may initially find this hard to follow. But none the less this is a well acted, high production value series which follows the development of our heroine, the teenage Princess Elizabeth. While time is compressed (understandably) it's fairly historically accurate and gives a great sense of Tudor England and the drama that plays out between factions. The fact that's it's based on reality not fantasy makes it even more compelling.
I hope Starz commission a 2nd season. There's a lot to pack into our young Elizabeth's life as she becomes one of Britain's greatest monarchs and this is a welcome addition to our playlist.