The devastating winter of 2014 reluctantly gives way to spring on the drowned Somerset Levels.The floods recede and as they do so a collapsed wall reveals a centuries-old act of cruelty and love.For Theresa this marks the end of her complacent and self-sufficient world. The past with its devotion and hope, violence and fanaticism, has broken into her life.But what she may never know is how her discovery of that ancient violence is now intertwined with the imminent danger of the future.