A hunter feelings

Anna has her master degree in arts of hunting and has america's best soldiers and hunters in her hunting camp. She is respected, powerful and stubborn. No battle was ever lost with her leading and fighting skills. She knows what she wants and how to get it, and nothing will stand in her way.
While making the newest strategies she recieves an intresting phone call with an intresting theory. She's not willing to believe, and pays no mind.

But what if the calls continue, and there is no way stopping it? What if the person who calls is, just as stubborn as you, more powerful, and willingly to do anything, and then I mean anything to get what he 'claims' is his?

Them what do you do?