Britain, 540 AD, 129 years since The Rescript of Honorius.
The Romans are a distant memory. Waves of aggressive migration from Saxons, Angles and Jutes have forced the native Britons further and further west.
The newcomers to this island are unaware of some of the horrors it contains.
After their village is destroyed a surviving Saxon family join forces with a slave, a Briton bandit and newly arrived migrants to confront these horrors.