Michael's sister arrives in town and tries to hide the real reason for her visit. Cathy resigns when she is accused of being part of the bird poaching racket. Alex tries to speak to Terence about Sophie, but he refuses to listen to what she has to say. Matt comes up with a plan to clear Cathy's name. Alex helps Michael's sister and her husband get back together. Cathy is reinstated, but she is not sure whether being a ranger is really what she wants to do. Terence receives some bad news about his daughter from Sydney.