The Night Caller(1998)

Pray she doesn't call you!

For 11 years, Beth's life is limited to working nights in a convenience store while her daytime hours are spent caring for her bed-ridden, bitter and abusive mother. All that keeps her going is a voice on the radio of a psychologist, Dr Roland. Her obsession grows to the point where nothing, not even murder, will stop her from getting to the woman she desires!