Anxious to explore the mysterious hidden world under metropolitan Berlin, an international group of four urban explorers hires a local guide, Kris, who leads them into the maze of escape tunnels and subterranean fortifications under the city. When their guide has a bad fall, two of the girls in the group frantically set off to seek help while Denis, the young American, stays behind. Armin, a former East German border guard suddenly appears from nowhere. Out of sheer desperation, Denis allows Armin to lead them and their unconscious guide to safety and it is at this moment that Denis realizes he has just made the biggest mistake of his life!
| Directing | Andy Fetscher | Director |
| Writing | Martin Thau | Writer |
| Sound | Steven Schwalbe | Music |
| Production | Oliver Thau | Producer |
| Costume & Make-Up | Dorota Budna | Costume Design |
| Art | Nobel Nobielski | Production Design |
| Sound | Robert Henke | Music |
| Production | Monika Mikkelsen | Casting |
| Editing | Andy Fetscher | Editor |
| Sound | Nigel Holland | Supervising Sound Editor |
| Lighting | Lars Petersen | Gaffer |
| Crew | Waldemar Pokromski | Makeup Effects |
| Sound | Joo Fürst | Foley |
| Lighting | Clemens Baumeister | Electrician |
| Crew | Jens Döldissen | Special Effects |
| Sound | Annette Prey | Dialogue Editor |
| Lighting | Tarek El Barbari | Electrician |
| Sound | Christian Bischoff | Sound Re-Recording Mixer |
| Camera | Andy Fetscher | Director of Photography |
| Art | Agata Uchman | Art Direction |
| Costume & Make-Up | Alice Möwius | Assistant Costume Designer |
| Editing | Carsten Eder | Assistant Editor |
| Lighting | Johannes Höber | Electrician |
| Costume & Make-Up | Beata Rółkowska | Makeup Department Head |
| Art | Patricia Walczak | Property Master |
| Camera | Laura Deschner | Still Photographer |
| Visual Effects | Janosch Benz | Visual Effects Supervisor |
| Lighting | Matthias Pilz | Electrician |