Thirty-seven minutes. That’s how long it took for her life to shatter.

Bianca was a law student with a bright future until the night she arrived thirty-seven minutes late to pick up her sister from the airport. Her sister was murdered, the killer was never caught, and Bianca’s future died with her. Now, she is a rideshare driver living in anonymity, convinced she deserves the shadows. She thinks she’s invisible. She’s wrong.

Someone is watching from the backseat.

Anonymous notes are appearing in her car—personal, threatening, and proof that her past has caught up with her. When a recent passenger vanishes, the notes make the stakes clear: You couldn't save your sister. But you can save her. To find the missing girl, Bianca must confront the ghost of who she used to be in a deadly cat-and-mouse game where guilt is the only weapon she has left.