An exhibition of ancient Egyptian relics comes to the British Museum and an anomaly opens in a mysterious monument called the "Sun Cage". A Pristichampsus, believed in Ancient Egypt to be the goddess Ammut, emerges and proceeds to wreak havoc in London. Cutter, Abby, Jenny and new security chief, Captain Becker (Ben Mansfield), pursue it through the city while Connor and new recruit, Egyptologist Sarah Page (Laila Rouass) try to stop more creatures coming through, and make some interesting discoveries about anomalies in the process. Meanwhile, Lester encounters a new adversary: the devious and ambitious Christine Johnson (Belinda Stewart-Wilson), who is after a strange artifact that Helen has stolen.
