A series of brutal murders has recently paralysed a rebel sect of over 100,000 fundamentalist Mormons in the US who practise polygamy as a way of showing devotion to God. The murderers justify these killings by quoting the doctrine of 'blood atonement', which allows the spilling of blood to avenge sins. Everyman examines the effect these killings have had on the fundamentalist Mormon community, and interviews former sect members, including one woman who admits she carried out 'blood atonement'. Where is the line to be drawn between fundamentalism and fanaticism?