米尔格伦实验（Milgram experiment)，又称（权力服从研究， Obedience to Authority Study）是一个非常知名的针对社会心理学的科学实验。主要是测试受测者在遭遇权威者下达违背良心的命令时，人性所能发挥的拒绝力量到底有多少。
该纪录短片是对1961年7月最初实验的复制，实验结果符合最初实验。

In 2007, in the midst of the drought and water shortages, the NSW State government has unveiled plans to tap into and recycle millions of litres of water trapped in a network of abandoned train tunnels just beneath the heart of Sydney. However the government suddenly goes cold on the plan and it is not made public why. There is talk of homeless people who use the tunnel as shelter going missing, even though the government states that there are no homeless people in there. This, and the silence from the officials and ministers, leads a journalist, Natasha to begin an investigation into a government cover-up. She and her crew Pete (Producer), Steve (Cameraman) and Tangles (Sound Technichian) decide to investigate the story in the tunnel.