A subtle pattern in a string of murders catches Susan Gray's eye, and she attempts to bring her discovery to the attention of the authorities. However, both the police and her husband urge her to dismiss her theory. Determined, Susan turns …

With the killer of the five girls within reach, Susan and the other women of Bletchley find their carefully constructed understanding of events shattered by a startling revelation. Forced to abandon their assumptions, they devise a perilous…

Confronted with the very killer they had so meticulously pursued, Susan and the other women of Bletchley find themselves entangled in a deepening game of desperation. The pursuit spirals toward a conclusion that feels increasingly inevitabl…