LONDON, 1930. The night is sooty, sulphurous, and malign. A spate of violent deaths has horrified the capital and the smog-bound streets are deserted. No woman should be out on a night like this.

But Rachel Savernake is no ordinary woman. To Scotland Yard's embarrassment, she solved the Chorus Girl Murder, and now – along with journalist Jacob Flint – she's on the trail of another killer. Savernake and Flint's pursuit of the truth will mire them ever-deeper into a labyrinth of deception and corruption.

Murder-by-murder, they will be swept ever-closer to that ancient place of execution, where it all began and where it will finally end: Gallows Court.