1919, far northern Queensland.

Fleeing from England and a violent marriage, Eva Willoughby arrives at her childhood friend’s home, a cattle station near the eerie and mysterious Black Mountain, the site of several unexplained disappearances. Although the war is over there is unease, and tensions are rising …

Not long after Eva finds employment as an assistant to Detective Sergeant Jack Shaw at the Ross Constabulary, her friend Sylvia disappears.

Shaken, Eva suspects that Sylvia’s disappearance is connected to the mysterious death of a troubled young soldier. Since her new boss is too preoccupied with a covert operation, and in spite of local superstitions about Black Mountain, Eva embarks on her own dangerous investigation to uncover exactly what happened to Sylvia.