When pregnant, 12-year-old Tui tries to kill herself in a freezing New Zealand lake, Detective Robin Griffin has plenty of questions for the girl. But when Tui suddenly disappears, Griffin finds herself knee-deep in small-town secrets. Armed with the fact that China Girl was pregnant, Robin launches into the investigation, including inside Sydney's sex industry. The meeting with her daughter's parents veers off the rails and puts contacting Mary at risk.