Seventeen-year old Paul can see the spirits of the dead. When one of these restless spirits crosses back into the living world, he is forced into a fight to prevent the apocalypse.

Horrible Histories returns for a special about King John and Magna Carta, starring Ben Miller. John annoys the Barons and agrees Magna Carta at Runnymede, after a banging rap battle. Meanwhile across the world we meet the formidable Genghis Khan in Mongolia, and catch up with the crafty Saladin during the Crusades. With of course, our host Rattus to guide the way!

In the arctic, as Saiva is being born, a shaman declares that she is evil and will bring harm to all who become involved with her. Saiva is cast out of her tribe of herders and grows up to live a nomadic existence with Anja, a young woman she adopts as an infant. Then Loki, an injured and starving soldier, stumbles into their isolated lives. The women nurse him back to health, but treachery, violence and doom await them all.