Annie Delancey is happily married with three grown children.
But she guards a secret. Aged eighteen she had a baby boy, and gave him up for adoption.
Out of the blue, she receives an official-looking letter from Social Services.
Her son wants to make contact. As the son she has never known comes back into her life, his presence begins to expose the cracks in the family that Annie now has to try, desperately, to hold together.