When Mary-Ann and Anthony's attempt to adopt their foster baby Grace founders at the last possible moment, they resign themselves to a lifetime of heartbreak. It doesn't help that Mary-Ann's sister Sarah, with three teenage kids, is always ready with interfering advice. Anthony seeks solace in the pub, Mary-Ann in running the local youth club. Then, a year later, a newborn baby girl is left in the backseat of their car. Mary-Ann knows the pain of giving up a baby and is determined to reunite mother and child without involving the police. But as the days go by with no sign of the mother, the chance of a happy ending starts to look more and more unlikely.