Red Sky (Metal Giants).

Bianca an emotionally unstable office worker is asked by a mysterious client to deliver documents insisting she must deliver them herself in person. On her arrival Bianca is kidnapped. Her captor, leader of a cult, drugs Bianca whilst tormenting her with continuous relentless indoctrination, forcing Bianca her to question the veracity of her memories, even those most life forming, as a victim of child abuse.