The leader of the country, called Pharaoh (who is plagued by voices), declares war upon society's 'undesirables'. Drug abusers, refugees, criminals and the homeless are all considered equally worthless and entered into a restricted ghetto, called 'Dreamland' (a former fun fair), where they cannot leave.
When Moses learns he was adopted by Pharaoh and is actually the son of an asylum seeker, he shuns his life of privilege to lead the ghetto's inhabitants in a revolt against his father.
A series of 'plagues' echoing the biblical story attack the inhabitants of the 'promised land' including algal blooms which turn the sea red (like the first plague of turning the River Nile to blood) and a computer virus (possibly a modern reworking of the sickness in live stock plague).
The plagues are treated as acts of terrorism by those in the promised land and violent reprisals are sought against those in Dreamland.