After six years of being on top of her game, Orla Flynn is growing weary of her demanding career as a social worker. Little does she know that a chain of events has been set in motion that will push her deep into a darker side of social work that, until now, she had never known existed. Children are missing, paperwork has been tampered with and even the most straight of her colleagues are keeping secrets. When Tina Madden comes into Orla's care, Orla realises the fate of the missing girls and sets out to get them back.