Mariah has suffered domestic violence once before, and when she gets close to a male colleague she thinks that she knows enough about him, to see that he is not that type. By the time they start living together he still hasn't shown his true colours, but eventually he cracks, and she realises that he is not who she thinks he is. Once again she is living in fear. When she begins to get targeted at her own home, and she is sure it isn't her ex, she's wonders if it's somebody living in her block ,of flats. She discounts this possibility as she has no enemies there, and is baffled as to who it might be. When the truth emerges it is both shocking and terrifying.