Freddy and Zeno are actually a happy couple. Actually. They don't know what it's like to have sex with other people, so Freddy wants to try an experiment, and Zeno can't bring himself to say no. But how do you go about finding sex partners? Freddy meets her former professor, but the opportunity to seduce her old crush goes completely wrong. And Zeno's date is also a disaster, until the couple from the shared flat next door invite him for a drink...

There is no 100% honesty when Zeno and Freddy tell each other about their first evening. They decide that they will not do that in the future; saying nothing is part of the deal from now on. But both of them suddenly experience much more than they expected: Zeno meets a former classmate with a suburban mother life, who takes him home with her. Freddy is looking for an adventure with an actor, but finds it with a lighting technician on the theater stage.

Zeno argues with his colleague, who questions his relationship with Freddy. But then the argument turns into a flirtation. Freddy sees the two of them and suddenly feels jealousy, a previously unknown feeling for her. To distract herself, she meets up with a friend and has her first queer experience. She definitely realizes too late that she is hurting feelings.

Zeno tells Freddy that he cheated on her years ago. Freddy is completely thrown off track by this information. She lets herself be carried away by a wild night and books a sex worker. Zeno meets the nice Anne, who, just like him, finds dates uncomfortable and exhausting. She also finds dates with someone who is in a relationship only moderately fun. But the two of them can talk well to each other.

The wedding of her otherwise perfect friend Tati turns into a disaster. Freddy wonders whether she is single now and is allowed to behave like that. Zeno, who feels sorry for himself, is taken to a rave in the forest by his best friend Moe. Against his will and against his expectations, he experiences an excessive night.

Freddy hears of someone who is supposed to be just like her. Despite her friend's warnings, she is determined to get to know him. Zeno learns that his biological age is around 50 and calls Anne. In doing so, he breaks the rules... When Zeno and Freddy meet at the end of the day, it could actually be a good moment. If only they were sure what the other person really meant.

Something has to change fundamentally, Freddy thinks. Maybe finally quit? Or live a life like the night-time customer at the pharmacy dreams of? Zeno and Anne have a relationship discussion, even without a relationship. Because Zeno still has one with Freddy. Anne understands that. Will they see each other again anyway?

The experiment ends after 30 days. In order to show themselves as a couple again, Freddy and Zeno go to the party of their perfect friends Tati and Philip, which turns out to be completely different than expected. What is left after the 30 days?