As the First World War ends, Kate Galloway moves to London after tragedy strikes; a fateful night leaves her with blood on her hands; Violet Davies fights for her place in the police force.

Kate and Billie handle a body disposal while the Saluccis hunt their missing heir. Violet goes undercover in police cells, facing tests of her abilities and ethics.

After WWI, a housewife opens a Soho nightclub to support her daughters, facing threats from gangsters and police while fighting to keep her business alive.

Kate gets involved with the Saluccis while Billie and Evie find comfort elsewhere. Turner pressures Violet, who stumbles upon something surprising at the club's reopening.

After details about Silvio's murder leak, Kate and Violet face mounting danger. Meanwhile, Evie struggles to cope with her loss.

Kate gains surprise support as she chases power at the club. Violet plans payback for Lily, and Billie contemplates what's next.