World War I is at its height, and amateur sleuth Nell Bray is dedicating herself to the suffragette movement. Her friend Jenny is hard at work at Nantgarrew military hospital, which specialises in Freudian analysis. When Jenny begs Nell to investigate the attempted murder of a patient, Nell heads for Nantgarrew to help. It is a mysterious place: someone is committing petty acts of sabotage to show their disapproval of Freud's theories; one soldier keeps a box of grenades and revolvers under his bed; and another is determined to reach Moscow by bicycle. Nell's bafflement turns to horror when the would-be assassin's aim finally turns true. Nantgarrew – devoted to healing – becomes the site of a murder, and Nell Bray is determined to solve it.|It's WWI, and suffragette-turned-sleuth Nell Bray is asked to investigate an attempted murder at Nantgarrew military hospital. The doctors, preoccupied by Freudian analysis, are blind to this and to the petty acts of sabotage and strange goings-on under their noses. So when Nantgarrew becomes the site of a murder, only Nell can find the culprit.