Seventeen-year-old Stephen Cartwright stands charged with a serious offence as his anxious father Peter looks on. We see the family months earlier as Peter tries his best to help his sons, Stephen and Dom, face the imminent death of their beloved mother. When palliative care nurse Charlotte arrives, Peter is grateful of her help at this most painful and stressful time for them. Stephen is less sure of this efficient nurse assigned to see his mother through her final days. When his mum passes on, Stephen becomes more suspicious of Charlotte's motivations.

While admitting new inmate Stephen Cartwright into the young offender's institution where she works as a prison officer, Tina Dakin senses that something does not seem right. Notifying her senior officer, Tina is distracted by another emergency, but on returning to Stephen's cell she discovers that the boy has taken his life. After her attempts to resuscitate Stephen fail, Tina's troubles multiply when a series of betrayals and cover-ups result in her becoming the victim of a crime.