When the thick fog descends on a school group, Dan and Ursula, two normal students from a modern school find themselves transported back to what looks like the year A.D. 75. And nothing is the same.

Dan finds that survival depends his fighting skills and a fearless ability to fight to the death.

Ursula discovers that she has magical abilities worthy of the most accomplished priestess. Soon these two become involved in the greatest struggles of their lives, as the realise that survival depends on skills that they never imagined they possessed