As her 21st birthday approaches, Katy Ferreira has not left her bedroom for close on two years. In fact, she has not left her bed - at 360 kilogrammes, she simply can't. Characterised by an indomitable spirit, Katy tries to make the best of a bad situation. She does the crossword in the Herald newspaper her mother brings home, consumes the food she craves - biscuits, pies, doughnuts, litres of fizzy drinks - and waits in hope for insulin and a solution to her plight. To pass the time she begins to compile her own crossword in one of the Croxley notebooks that have been unused since she dropped out of school. Within each cryptic clue is a message, an attempt to explain how it feels to be 'the fat girl', how taking comfort in sweet things as a grieving and lonely child escalated into a deadly relationship with food and a psychological and physical disease.