Professor River Song meet a race known as the Discordia - time-travelling bandits with little regard to the laws of time. Looking like demons, they go around changing history to suit their needs and it seems as though River is the only one who notices. Things only get worse when one of them develops a crush on her.
Professor of archaeology, Bernice Summerfield, is kidnapped into an alternative, war-torn universe where she teams with a new Doctor on 4 new adventures.