Lawyer, wife and mother Faith Howells is drawn into a mystery when her husband and business partner Evan disappears. He leaves for work but never arrives. His sudden absence strikes deep into the heart of his tiny Welsh community and forces Faith to come back from extended maternity leave to defend a hopeless vagrant on a shoplifting charges. As an increasingly desperate Faith searches for clues, she uncovers new revelations about Evan's private life and questions how well she really knows the man she loves.

Now in custody, Faith butts heads with DI Williams, who believes she may have more to do with Evan's disappearance than she is letting on. At the police station, Faith encounters Reverend Talbot, a family friend, and represents him on charges of misusing church funds. Tom enlists the help of his friend, Swansea detective DCI Parry, to look into his son's files, while Lisa tracks down a lead at a lap-dancing club Evan was seen frequenting. Troubled by the discovery of a DNA test kit in Evan's office, Faith confronts Marion and uncovers a dark family secret.