Every year, Paige and her family have spent the summer at the Covingtons' vacation house on Shadow River. After all, Audrey Covington is her best friend. Or rather, she was. Last summer, everything changed after Audrey went missing. At the time, the Shadow River locals wondered about a connection to Madison Blake, another girl who'd disappeared, except the two girls came from completely different worlds. This year, Paige plans to spend her time at the Covington house with Audrey's older brother Nate. But then Paige discovers something hidden in Audrey’s old room: a burner phone, containing a text chain from a secret guy. It’s Audrey’s final text that makes Paige’s blood curdle: “What are we going to do about Madison?” If she isn’t careful, she could become missing girl number 3...