In the Australian city of Sydney two mates are dared to undertake an initiation into a local gang, which sees them drawn into disused tunnels under the city. What starts out as a simple dare leads the boys into the dark and mysterious underworld.Initially left out of the boy's adventure, their friend Su Lin discovers that the boys don't know the significance of what they find and sets out to convince the boys to use their knowledge to save the existence of the visitors living beneath their feet.
