At an exhibition, graphic designer Stefanie is thrilled by the work of John Heartfield, the inventor of political photomontage 100 years ago. While trying to understand his life on the run, she suddenly finds herself in Heartfield's studio.

When his partner Susanne Koch is not lying in bed next to him as usual in the morning, Inspector Martin Brühl knows immediately that something is wrong. What he doesn't know is that Susanne has witnessed a crime on her way home at night. She was seriously injured when an ATM was blown up and was quickly taken away by the perpetrators.

The shy late twenties Torsten tile lives with his mother in a bleak Berlin slab. In the guise of his alter ego "Lux - Warrior of Light" he tries to make the world a little bit better. He distributes food to the homeless and helps out on his forays through the city wherever he can. A film crew accompanies him to make a documentary about the social engagement of the self-appointed real-life superhero. Jan, the director, is still looking for a donor. The resourceful producer Brandt shows interest, but on condition that he sees something spectacular.

On her wedding day, Franziska discovered that her fiancé was having an affair with another woman. Now she believes that all men are pigs. Sooner or later, every man cheats on his wife, the 29-year-old is firmly convinced of this. And for good reason: as a fidelity tester, she exposes unfaithful men on behalf of suspicious wives. Her success rate is 100 percent. But then Franziska is assigned to Markus, who seems immune to her charms. Are there really any faithful men left?