A haunting psychological thriller based on the true story of the unusual relationship between serial killer Fred West (Dominic West – The Wire) and his “appropriate adult” Janet Leach (Emily Watson – Gosford Park). After volunteering as West’s appropriate adult – a person from the community who assists vulnerable adults facing criminal charges – Janet finds herself sitting with West during his highly-charged police interviews. As Fred quickly becomes dependent on Janet, he draws her deeper into his mind games and refuses to cooperate with the authorities. Janet struggles with the traumatic confessions she is forced to hear, but is driven by her sense of duty to the victims and their families to discover the truth. As the stability of her family is threatened and she begins to fear for her own mental stability, will Janet remain strong enough to see justice served?