When a woman is brutally murdered in the night, and her body dumped outside a government building, maverick Detective Pamela Green is convinced they’re looking for a male killer. But in a world where men are under curfew after dark, who could have killed her and how?

Unconvinced by their suspect’s confession, Pamela ignores Ferguson’s orders and drags Eddie along to investigate the men in Helen’s life: her grieving boyfriend Patrick and their cohabitation counsellor, Tom. In the past, Sarah receives some chilling news, and Sian takes legal action.

Pamela and Eddie discover the site of Helen’s murder, and Billy has a lot to explain when his secret is revealed. Pamela’s maverick ways get her into trouble with DCI Ferguson. In the past, Cass pursues Max and puts Billy in a difficult position.

In the past, we experienced one night during Curfew. Eddie’s perfect plans fall apart, Billy is drawn into a toxic online culture, and is Helen safe in her own home?

New evidence causes Pamela to doubt herself, and the case starts to feel more personal than ever to her. Pamela and Eddie wonder who they can trust. In the past, Ben and Sarah cross a line, Cass causes a scene at the school, and we discover what drove Helen and Sarah apart.