Livia Denby is on trial for attempted murder. The jury has reached a verdict.

Two years earlier, Livia was a probation officer in Yorkshire, her husband Scott a teacher. Their children, Heidi and Noah, rounded out a happy family - until the day Scott's brother died.

Grief and guilt leave Scott searching for answers, a search that takes him into the world of conspiracy theories. As his grip on reality slides, he makes a decision that will put the family on a collision course with tragedy.

Livia's family has been torn apart, and now her son's life is hanging in the balance. Just how far will she go to save the ones she loves?