She can hide, but for how long?

Sadie Haller-Bent has already taken the first steps to putting her divorce and her father's death behind her. She has a new apartment, a new job, and a new life ahead of her. And things are going okay. Maybe not perfectly, but at least she's on the right road. She can see some light at the end of her dark tunnel.

That is, until tonight. Because tonight, she woke up to find a killer at her door and a strange woman on her balcony, promising help.

In a split second, Sadie makes the only decision she can and puts her faith in a stranger. Now she's on the run, caught in the middle of deadly a chase that she can't even begin to understand. She can't trust anyone, not even the police. But if she wants to survive, she needs to answer three very important questions: Who could possibly want to kill her? Why? And most importantly, can she stop them before it's too late?