When Cathy sees Laura in the school playground she joins the other parents in admiring her gorgeous newborn baby, Liam, but when Laura suddenly feels unwell Cathy is so concerned she walks her home. Laura then disappears for weeks. Her seven-year-old daughter Kim is collected from school by Laura's mother-in-law, who wants nothing to do with anyone outside the family. Busy fostering, Cathy tries to put her worries to one side, until late one night she receives a phone call that changes everything. Cathy is shocked by the decline in Laura's mental health. She thinks Laura could be suffering from severe postnatal depression and knows she must see a doctor urgently, but Laura's family have other ideas.