This friendship develops against the background of Polly's growing up in her own disintegrating family life: her father Reg leaves, and a new lodger moves in and begins a relationship with her mother, Ivy. When Ivy sends her to live with her father in Bristol, it soon becomes apparent that she was not wanted there, her father having neither told his girlfriend that she was coming nor that she was supposed to live with them permanently. Eventually Polly moves in with her grandmother, who acts as a strong, fierce, strict anchor in her life.