Two days ago, Bree’s sixteen-year-old sister, Alissa, ran away from home. It wasn’t the first time. But unlike before, this time there was no note, and Alissa hasn’t been heard from since.

When a backpack appears on the front porch, Bree is confused to find Alissa’s belongings inside—including her wallet—as Alissa is still nowhere to be found. Then the text messages begin: I have your sister. Now I want your brother.

As the messages increase in frequency and urgency, one thing becomes clear: time is running out . . . for all of them.