Beneath New York City lies a perilous and shadowy realm, concealed within the neglected subway tunnels and extensive forgotten infrastructure. A budding documentary filmmaker ventures into these depths to reveal the hidden narratives of those dwelling beneath the surface. However, she soon discovers that the darkness is not the only thing to fear. A shadowy individual, operating outside the bounds of the law, has waged a battle against the external world, endangering the delicate underground community and potentially the city above.