Quinn and the Water Police are devastated when a young woman dies at the station; and, the detectives search for a kidnapped six year old girl.
The detectives try to determine the identity of a lost six-year-old girl found wandering Circular Quay in blood-streaked clothes and eventually find themselves trying to unravel the circumstances of her father's murder. Constable Matthew Quinn is devastated when a young woman in his charge commits suicide by jumping off the balcony at the station.