While walking on the river bank one night the recluse, Maggie Norrice, sees a car go through the railings and off the bridge into the River Sparrow. The incident wakens deeply hidden memories and her demons come back to haunt her.When the car is hauled out a dead man is found inside. Inspector Campbell discovers that this disaster is no accident. He and his team investigate the goings on in this remote Fenland village to find the perpetrator of this crime. But has the strange recluse, who lives in the old wind pump and who only comes out at night, seen the murderer?