Runner - 4

Chicago in the dead of winter can be brutal, especially when you're scouring the frigid streets for a missing girl.

Fifteen-year-old Ramona Titus has run away from her foster home.

Her biological mother, Leesa Evans, is a recovering addict who admits she failed Ramona often in the past.

But now she's clean. And she's determined to make up for her mistakes—if Cass can only help her find her daughter.

Cass visits Ramona's foster mother, Deloris Poole, who is also desperate to bring the girl home.

Ramona came to Deloris six months ago, angry and distrustful, but was slowly opening up.

The police are on the search, but Cass has sources closer to the streets, and a network of savvy allies.

Yet it seems Ramona doesn't want to be found. And Cass soon begins to understand why. Ramona is holding secrets dark enough to kill for, and anyone who helps her may be fair game. And if Ramona can't run fast enough and hide well enough to keep the truth safe, she and Cass may both be out of time.