When a school trip turns deadly at a restored windmill, photographer Georgina Drake finds herself swept up in a murderous plot… After a class of children falls mysteriously ill and their teacher dies from eating poisoned sausage rolls, suspicion falls on mill owner Louise Wilkins. And when Georgina's beloved spaniel Bert eats the same contaminated food, the case becomes deeply personal. Working with her aristocratic friend Sybbie and the ever-sceptical DI Colin Bradshaw, Georgina delves into the mill's dark history and uncovers a chilling parallel: over a century earlier, the miller's daughter was accused of poisoning a local family with arsenic-laced flour. Is someone using the Victorian case as a blueprint for a modern-day murder? With the poisoner growing bolder and time running out, can Georgina solve both mysteries before the truth is buried forever…?