Gabrielle Adams had a good life: a promising publishing career, a devoted fiancé and a future filled with possibilities. Then everything changed. A serial killer targets commuters on train platforms --- striking without warning, disappearing without a trace. Gabrielle is the only one to survive. Struggling to cope with the trauma, she retreats to a quiet coastal village in Cornwall, taking a job running a small bookshop. It's meant to be a fresh start. A second chance. At first, the peaceful town and its rhythms soothe her frayed nerves. But something feels off. Whispers follow her. Footsteps echo at night. And someone knows who she is. As past and present blur, Gabrielle begins to wonder: did she escape the killer...or walk straight into something worse?

Dr. Alexander Gregory, a psychologist recovering from the collapse of a high-profile criminal profiling unit, wants nothing more than a quiet life to finally sit and think things through. But his rare ability to understand the minds of violent offenders makes him hard to ignore --- especially when a small town is shaken by a brutal murder. Reluctantly pulled into the case, Gregory finds himself confronting not only a cunning predator, but the darker corners of his own mind.