The creators of Sherlock give the legend fresh blood! It's 1897 and St Mary's Convent in Budapest plays host to a desiccated husk of a human being, Jonathan Harker, an English lawyer with a strange and unsettling story to tell. Listening in is the kind and inquisitive Sister Agatha, a nun with an unusual interest in the creatures of the night. Invited to Transylvania to meet the reclusive Count Dracula, Harker finds himself trapped in an ancient, terrifying castle, a maze of mouldering corridors and vaults: a prison without locks. It soon becomes clear that he and his client are the only things living in the echoing halls of the moulding pile, and that the Count himself isn't living at all. In fact, Dracula is a 400-year-old vampire who has grown weary of his own exhausted country and has set his sights on the new world.