A brutal murder at a remote psychiatric retreat unearths a maze of locked therapy rooms beneath Cross Creek Ranch — and a mastermind the media dubs 'The Therapist,' who has weaponized a network of sleeper patients across Texas. As Rangers Baker and Tate close in, the case explodes into a statewide manhunt where the threat doesn't hide in the shadows. It hides in the mind.

When a prominent Texas rancher is found strangled on his sprawling estate, Rangers Baker and Tate uncover his connection to the secretive Murder Club — wealthy landowners who weren't just studying the notorious Bandanna Strangler, they were surveilling him. But someone else was watching them, and now the club's members are being hunted, with a decades-old secret linking the killer to one of their own.

When a rural Texas ranch house explodes, Rangers Baker and Tate discover the charred remains of nearly thirty people — and a killer systematically destroying human-trafficking safe houses with their occupants inside. Racing to evacuate victims before the Iceman strikes again, Ruth must navigate the dark intersection of human trafficking, domestic terrorism, and a nation divided.

A derailment exposes a trafficking pipeline that has been moving human cargo through the heartland for years — and another train departs in hours, carrying children who will disappear forever if it reaches its destination. Ruth boards it, and now she and Aaron are trapped on a speeding train full of killers where there are no scheduled stops, only scheduled deaths.

A diplomat's daughter vanishes between two governments that both deny she ever existed. The closer the truth comes, the less anyone around her can be trusted.