Ten years ago, Theodora "Teddy" Angstrom's older sister, Angie, disappeared. Her case remains unsolved. Now--on the anniversary of Angie's disappearance--Teddy's father, Mark, has killed himself. Unbeknownst to Mark's family, he had been actively investigating conspiracy theories sourced from a Reddit community of true crime fans fixated on Angie, and Teddy soon finds herself falling down that same rabbit hole as she struggles to reconcile new information...

While visiting Angela, one her proteges in Kansas, V.I. Warshawski, when Angela's roommate goes missing and V.I. finds her near death in a drug house, is pitched headlong into the country's opioid crisis and a local land-use battle with roots going back to the Civil War.