Anna to the Infinite Power (1983)

Anna Hart was always an odd child a genius a shoplifter desperately afraid of flickering lights with strange prophetic dreams Simultaneously several strange things begin to happen A strange mysterious neighbor by the name of MacKayla moves in next door to the Harts And most frightening of all Anna sees her exact double on the television one night As her investigation of the other Anna Anna Smithson progresses she begins to learn the truth The truth about a woman named Anna Zimmerman that has been dead for twenty years and most importantly the truth about herself