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...

After the Underwater Investigation Unit's disbandment, public outcry ushers Sloan McPherson and her partner, former navy diver Scott Hughes, back into the depths of crime solving. Sloan's longtime family friend Fred Stafford has disappeared. Left behind: his abandoned truck in the vicinity of an unmarked sinkhole and new findings that have Sloan second-guessing everything she thought she knew about the man. As Sloan's investigation unfolds, a tragic...