It's been ages since Molly last heard from her mum, Ro, and she's worried. Not that Ro hasn't done this before – since the divorce, Molly hasn't known what to expect from her mother. If only things could go back to the way they were before Ro disappeared and her dad remarried . . . but then she wouldn't have her half-brother Locky, and now she can't imagine her life without him. When a letter finally does arrive, Molly learns her mum's made some big changes . . . but there's an even bigger surprise in store for all of them . . .