Footsteps in the Fog is a cat-and-mouse Victorian melodrama in the grand tradition. Jean Simmons plays scheming servant girl Lily Watkins, who was hired by sinister nobleman Stephen Lowry (Stewart Granger) and his ailing wife. The wife dies of natural causes, but Lily knows better, and uses this knowledge to her advantage.
In exchange for her silence, she forces Lowry to cater to her every whim. He is forced to go along lest he face the gallows, but in a switch reminiscent of the lost ending of 1987's Fatal Attraction, he sees to it that Lily herself is carted away by the constabulary.
Filmed in appropriately dank Technicolor, Footsteps in the Fog is an unusual foray into Gaslight territory for director Arthur Lubin, normally a comedy specialist.