Abandoned by his father after his mother dies, young PS lives in suburban Sydney with his aunt Lila and her husband George. While they lead a modest existence, PS is happy with them. However, his contentment is derailed when Lila's wealthy sister, Vanessa, returns from England and takes an interest in PS.

Sydney homicide detective Sergeant Scobie Malone and his offsider investigate the murder of Helga, whose corpse is found in the basement of the Sydney Opera House.