Episode 1 is the first episode of the Season 1 of Top of the Lake
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In the small town of Laketop, New Zealand, a young girl named Tui Mitcham tries to drown herself in a lake. After she is rescued, a school nurse notices that Tui is pregnant. Tui has escaped from a compound where her brothers, Mark and Luke Mitcham, and their father, Matt, are living; they are adjacent to Paradise, where a group women live in shipping containers next to the lake. The Mitchams drown Bob Platt, a local real estate agent, after a confrontation over sale of the land on which Paradise sits.
Robin Griffin, a police inspector from Sydney, is in Laketop visiting her cancer-stricken mother and her mother's volatile boyfriend. Robin is called to interview Tui at the police station, and encounters friction from male police officers. When Robin asks Tui who her baby's father is, she writes "NO ONE" on a piece of paper. Robin tells Sgt. Al Parker, the ranking officer at the station, that Tui's pregnancy is evidence of statutory rape and deserves a full investigation. He is noncommittal, and tells Robin that the best place for Tui at the moment is back at Matt Mitcham's residence.
Al takes Tui back to the Mitcham compound and tells Matt that she is pregnant. After a confrontation with Matt, Tui steals a gun and leaves his house, ending up at Paradise. Meanwhile, Robin starts her investigation of Tui's pregnancy and visits her mother. Robin meets Johnno Mitcham, who claims that Tui is his half sister. While staying at her father's cabin, Robin receives a bag and a note from Johnno, who is camping nearby. The following morning, Robin rebuffs Johnno when he alludes to a past incident involving her and a group of men. Afterwards, Robin sees Platt's body floating in the lake.
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