One on Top of the Other (1969)

In "One on Top of the Other," a physician in San Francisco stumbles upon a sex worker who looks remarkably like his deceased spouse. This shocking discovery leads him down a complicated path as he becomes increasingly obsessed with her. As he navigates his emotions and the blurred lines between love and longing, he finds himself entangled in a web of deception and desire, ultimately confronting the haunting memories of his past and the choices that define his present.