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!
Nathalie Kelley
as Mallory / Lucia
Klaus Stiglmeier
as Armin
Nick Eversman
as Mickey / Denis
Catherine de Léan
as Olympia / Marie
Max Riemelt
as Dante / Kris
Brenda Koo
as Haiku / Juna
Adolfo Assor
as Man on the Platform
Johannes Klaußner
as Young Man in the subway
Andreas Wisniewski
as Neo-Nazi #1
Carlo Degen
as Waiter in Bar
Sascha Marten
as Neo-Nazi #2
Tim Holzapfel
as Child #1
