Mary Parker, the mother of Jack who has just had a liver transplant, wants to meet the family of the donor to thank them personally for saving her son's life. Karen and Beth advise Mrs Parker that donors and their families must remain anonymous. But Karen begins to wonder whether a meeting would help both families to come to terms with the situation. Despite warnings from Anna and Beth, Karen arranges for the Parkers to meet Julie Sprake, whose son Ben was the donor. The meeting between Julie and the Parkers threatens to backfire when Julie wants to become more involved with Jack. The situation lurches from bad to worse when Julia disappears with Jack. Bob and Mary Parker are distraught, and blame Karen for their son's disappearance. Julie and Jack are discovered on a remote hillside, and Jack is whisked to hospital. The Parkers are frantic, fearing the worst for their son. Anna and Simon are settling into family life. But the pressures of new parenthood put their relationship under st