In the depths of Missouri's Lake of the Ozarks, a sinister legacy waits. FBI Special Agent Kate Reid and the rest of the BAU team plunge into the chilling investigation of a DEA Agent's murder, only to uncover a haunting trail of death that stretches back through time. As the body count climbs, Kate must navigate a treacherous web of secrets and deception, all while battling her inner demons and facing the fallout of her troubled marriage.

But when the killer strikes again, she knows she must push herself to the brink and risk everything to save an innocent life. With evil lurking beneath the lake's tranquil surface, will Kate be able to put an end to the killer before he claims another victim?