Henrik Regel and Björn Birg have submerged themselves in the underground scene of the Berlin train writers, who spray the S-Bahn and subway wagons with graffiti. A life between art and illegality.

Seven years in the making, filmmakers Henrik Regel and Björn Birg portray four generations of Berlin spray paint artists who specialize in trams and underground trains. Extremely undercover, extremely criminal and extremely forbidden.

What makes teens and even grown men spend nights without sleeping, invest tons of money in cans of spray paint, trick security guards and risk fines and prison? All this to get almost nothing in return, apart from a little respect from a very limited circle of people? In intense interviews and clandestine footage, filmmakers Henrik Regel and Björn Birg seek out train writers and document their story.