Attempting to become the most claustrophobic film in the history of cinema, this thriller will transport its viewers to narrow dungeons of Copenhagen. Rie, a PR coordinator, goes down the tunnel with a task to portray European cooperation in the Metro construction. Suddenly an accident occurs. The woman and two workers – Ivo from Croatia and Bharan from Eritrea – remain imprisoned in a tunnel-boring machine. With less and less oxygen remaining, a fierce, messy and suffocating struggle for survival begins…