It's hard to pretend that everything is normal when your whole life has been turned upside down …

'She's gone!'

The letter said she needed time to be herself again. But what does that mean?

Greg and Lucy, at fourteen and twelve, act cool and responsible when their mother leaves. Six-year-old Grace is just bewildered. Conor, a troubled ten-year-old, takes drastic action to show how he feels.

And behind it all there is hope, and the beginnings of a plan to bring their mother back.