Evanescence

That's what her brand of cigarettes was called. They were triggering her ability to disappear whenever she wanted to. That was her special gift. And that's why she had escaped the attention of other photographic investigators for so long. Not mine of course. The task was simple. Shoot her the moment she disappears and wait to see her reappear… because disappearing is understood, it's the reappearing that puzzled me. The mission was a success, but, then, you will never know if I am telling the truth. And I hope that you will also find it hard to believe that I have stolen  some of her cigarettes while she was gone…