How deadly is the fight for equality? It's 1922 and after spending a year travelling through Europe Iris Woodmore returns home to find a changed Walden. Wealthy businesswoman Constance Timpson has introduced equal pay in her factories and allows women to retain their jobs after they marry. But these radical new working practices have made her deadly enemies. A mysterious sniper fires a single shot at Constance - is it a warning or did they shoot to kill? When one of her female employees is murdered it's clear the threat is all too real - and it's not just Constance in danger. As amateur sleuth Iris investigates she realises the sniper isn't the only hidden enemy preying on women.