In a converted Georgian townhouse in south west London, three families live under one roof. The large flat that takes up the top two floors is home to the Harlow family: happily married Paul and Steph, and their bubbly teenage daughter Freya. The smaller first floor flat is rented by Emma, who spends most of her time alone, listening to people coming in and out of the building. And the basement flat belongs to Chris, a local driving instructor, who...