On the cusp of forty, Justine Bailen, better known as Jo, works for an all-female detective agency based in Tucson, Arizona. While staking out a cheating spouse, she learns that her long-estranged best friend from childhood, Rose, is missing, and that Rose's mother wants to hire Jo to find her. This case is all kinds of wrong for Jo, but she has no choice but to head back to her hometown, an hour north and a world away from Tucson.
Back in Delphi, she learns that her high school boyfriend, Tyler--who is probably part of the reason her friendship with Rose went south--is the cop assigned to the case. It doesn't take long for Jo to realize that he's all mixed up in it, too. To have any hope of learning the truth about Rose's disappearance, Jo must finally face the demons she thought she'd escaped.