Alison Hart, a medium by trade, tours the dormitory towns of London's orbital ring road with her flint-hearted sidekick, Colette, passing on messages from beloved dead ancestors. But behind her plump, smiling persona hides a desperate woman: she knows the terrors the next life holds but must conceal them from her wide-eyed clients. At the same time she is plagued by spirits from her own past, who infiltrate her body and home, becoming stronger and nastier the more she resists....