Between October and December 2006, five women are found dead at different locations around Ipswich, Suffolk, all of them sex workers who had gone missing from the town's red-light district. The film lays out the investigation as it happened: Gemma Adams and Tania Nicol vanish first, then bodies begin turning up in rivers and roadside verges, and Suffolk Police face a mounting death toll with no suspect. DNA recovered from the crime scenes eventually links the murders to Steven Gerald James Wright, a 48-year-old forklift truck driver living close to the area where the women worked. His arrest, trial, and conviction on all five counts close out the case, but the film spends real time on the victims themselves, Gemma Adams, Tania Nicol, Anneli Alderton, Paula Clennell, and Annette Nicholls, and on how a marginalized, largely invisible group of women became the target of a single killer operating undetected in a small English town.