Annie Delancey is happily married with three grown children. But Annie 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 Kent Social Services. Her son, Daniel, wants to make contact. On the one hand she is overjoyed - she longs to meet him. On the other, she has never told her children that they have another sibling. Now, the presence of the son she has never known begins to expose the flaws in the family Annie must try to hold together.