Out on the town in New York to celebrate Mike's last night of freedom a group of friends attempt an all night bar crawl in search of some bachelor's action. But, when they board the last subway of the night to head downtown they take a premature exit at a deserted station that was closed years ago trapping them beneath the busy streets above. With mobile phones that don't have reception and a maze of tunnels that all look the same, they decided to walk the tracks in search of a way out. But deep in the tunnels, they witness a horrendous act of violence that terrifies them and places their lives in danger. While being haunted beneath the streets of New York City it begins to look like Mike's last night of freedom could very well be his last night ever.