Robin and Aurora's newborn Sophie is proving to be quite a handful. They hire a partially trained nurse, Virginia Mitchell, to come and help the new parents for a few weeks when Robin has to leave town for work and Roe is struck with a bad case of the flu. One particularly stormy night, Roe wakes to hear her daughter crying and Virginia nowhere to be found. Searching for her reveals a body outside ... but it isn't Virginia's. Now, not only does Roe have a baby to care for but a new puzzle to contend with - who is this mystery woman dead in their backyard, and what happened to Virginia?