A Russian KGB agent is sent to Africa to kill an anti-Communist black revolutionary. However, he has a change of heart when he sees how the Russians and their Cuban allies are killing and repressing the locals, so he switches sides and helps the rebels.
Upon moving to Britain to get away from American violence, astrophysicist David Sumner and his wife Amy are bullied and taken advantage of by the locals hired to do construction. When David finally takes a stand it escalates quickly into a bloody battle as the locals assault his house.