Grace Wilde is the girlfriend of Michael Byrne. But she isn't happy. She feels unloved by Michael. She's unaware that he's actually sleeping with someone else. Max Tyler makes a return to the school in Greenock. He sets his sights on Grace. He can see how Grace is feeling and the two of them soon start an affair. How long can Grace keep it hidden that she's sleeping with Max Tyler? Especially when secrets always have a way of coming out at Waterloo Road.