Everything is changing in Emily's life. Her older sister Kat is just starting university; Dad and Cassy have bought an old house, which will be their dream home...except that while it's being done up, they've all got to live in a tiny caravan in the middle of a field.

Then a throwaway comment starts Emily thinking about her real mother, who left while Emily was a baby.

Over the years, she has become the unmentionable secret in Emily's family.

As Emily pieces together a truer, fuller picture of her mother, she also embarks on a new relationship with Seb...