"When others get off the train to finally go home, Leonie Müller stays behind. That's because she already is home: The train is her apartment, and she says she likes it that way. She bought a subscription that allows her to board every train in the country free. Now, Müller washes her hair in the train bathroom and writes her college papers while traveling at a speed of up to 190 mph. She says that she enjoys the liberty she has experienced since she gave up her apartment."