Bluebell Gadsby is 13 but that's the least of her problems. Both her parents seem more interested in their careers than the family, leaving Blue and her three siblings as well as their three pet rats (who may or may not be pregnant), in the care of Zoran the au pair. The enigmatic Joss moves in next door and Blue thinks she might be falling in love, until he takes out her older sister Flora instead (who, incidentally, is trying to make a statement by dyeing her hair bright pink but no one takes the blindest bit of notice). Blue thinks and feels very deeply about life, but can't really talk to anyone about it because no one in the Gadsby family wants to address the real problem - that Blue's twin sister, Iris, died a year ago, and they are all just trying to hide their grief in busyness.