Gemma's perfect life comes crashing down when her devoted husband is arrested for murder. As Gemma learns to navigate the prison system, she meets a group of women who will become increasingly important as she starts to think the unthinkable; could her husband be a murderer?

Harriet is devastated when she realises Gavin is the victim of prison bullying. But is she prepared to smuggle drugs into the prison to buy his protection? Meanwhile, Francesca faces homelessness, and Gemma is about to discover something that will change her life forever.