- Wanda works as a call girl in Berlin. She has no idea that Waller, the introverted tenant in the apartment next door, is keeping a constant eye on her. But there's more she doesn't know: Waller has been blackmailing her clients with secretely recorded videotapes. That's where the money she finds in her mailbox comes from.
Waller and Wanda finally bump into each other in front of their apartments. Waller knows Wanda's got a dark secret, but she refuses to let him in on it. She tries to shake him off. What Waller doesn't know is that Wanda's husband is blackmailing her, holding their son hostage and forcing her out on the streets. But Waller finds out and sets himself up as her guardian angel. Promising her a new, better life, he kidnaps her and takes her out on one final "tour".