On a suburban street filled with secrets, 84-year-old Edie Green must look back into the past to discover what happened to her friend Lucy, who went missing years before. A mystery she can't remember. A friend she can't forget. I kept your secret Lucy. I've kept it for more than sixty years. It is 1951, and at number six Sycamore Street fifteen-year-old Edie Green is lonely. Living alone with her eccentric mother - who conducts seances for the local Ludthorpe community - she is desperate for something to shake her from her dull, isolated life. When the popular, pretty Lucy Theddle befriends Edie, she thinks all her troubles are over. But Lucy has a secret, one Edie is not certain she should keep. Then Lucy goes missing.