In October 1989, the part of the West Berlin borough of Kreuzberg called SO 36, had been largely shut off by the Wall from the rest of the city for 28 years. A lethargic sub-culture of students, artists, bohemians and barflys had flourished among crumbling buildings. Part of that microcosm is barkeeper Frank, semi-formally called 'Herr Lehmann' by friends and patrons. He hangs out drinking, sports utter disregard for anything beyond SO 36 and lazily pursues an affair with cook Katrin. His lifestyle is gradually disturbed, when his parents show up for a visit, things go awry with Katrin and his best friend Karl starts to act strange. Meanwhile, political turmoil mounts on the other side of the Wall.

Frank Lehmann, 20, still lives with his parents in the dreary high-rise housing project "Neue Vahr" in Bremen. It's the year 1980 and Frank gets drafted to the army even though his friends assure him that "he's not really the guy for it". When he gets back home, after his first week at the army, his Dad has turned his room into a TV repair shop, so Frank has to move out. Luckily his old friend Martin is starting a commune with two other Punks in Bremens leftist borough "Viertel". Frank, without further ado rents the unlivable walk-through room. From now on Frank is a traveler between the Worlds. Each week he goes from the Army, with all the unconditional rules and regulations to the commune where his friends are preaching the world revolution. Frank is trying to avoid to stick out, but fails miserably, in both worlds.