12 years old and 5 months pregnant, Tui Mitcham walks into a freezing lake ... then disappears. Detective Robin Griffin returns home to investigate, but it's not a simple missing persons case. In this breathtaking but remote mountain town, there are evil forces as powerful as the land itself. And those who offer a glimpse of paradise also provide a path to hell. Trapped where happiness and honest work are just out of reach, Griffin must not only find the girl but also face her own haunting past. With the men that she once left behind now standing in her way, every step closer to solving the case unearths a dangerous truth about herself.

The second season of "Top of the Lake" is a crime mystery story that begins four years on from the explosive ending of series one. "Top of the Lake: China Girl" is a crime mystery story that finds Detective Robin Griffin, recently returned to Sydney and trying to rebuild her life. When the body of an Asian girl washes up on Bondi Beach, there appears little hope of finding the killer, until Robin realizes that "China Girl" didn't die alone. Robin's search to discover "China Girl's" identity takes her into the city's criminal underbelly and closer than she could have imagined to the secrets of her own heart.