Ania Kwiatkowska, played by Agnieszka Więdłocha, is a 27-year-old single woman working as a music teacher at an elementary school. Her life takes an unexpected turn when she decides to try online dating. After being stood up by a user known as "Ant_Man", she catches the attention of Maciej Stuhr, who plays Tomek Wilczyński. Tomek is a highly successful and popular TV host and puppeteer who is well-acquainted with the attention of women. Viewing Ania's vulnerability and unsuccessful dating situation as an opportunity for a "game," he attempts to use his charm and status to convince her to sleep with him. However, Ania is completely unimpressed by his brashness and blunt approach, firmly informing him that she expects knightly behavior from anyone seeking her affection.
In a retaliatory move, Tomek creates a puppet named "Hania" for his television show, designed to look exactly like Ania. He uses the puppet to mock her personality and behavior on air. The segment is such a massive hit with the audience that the network schedules the show for primetime. This shift in direction leads to the replacement of Piotr Głowacki, who plays Marcel Galiński, the show's producer and Tomek's long-time friend.
Needing more material for his popular segment, Tomek tracks down Ania and proposes a business arrangement: if she continues to go on online dates and provides him with the details of her experiences to use as inspiration for his sketches, he will donate a brand new piano to her school. Ania agrees and begins using the dating app "Planet Single" to find suitors. While the resulting sketches are a huge success, Ania begins a friendly digital correspondence with a mysterious user called "Bitter-Sweet". Despite Ania's desire to meet in person, "Bitter-Sweet" insists on chatting only. Meanwhile, Ania's relationship with her estranged mother remains tense, as her mother strongly disapproves of her online dating habits.
The plot thickens when "Ant_Man", whose real name is Antonio, reappears and begs for a second chance. Ania agrees to a date and finds herself genuinely liking him. Antonio reveals that he has been a widower for several months and missed their first date because he had to care for his daughter. When Ania shares this with Tomek, he becomes consumed by jealousy, as he has slowly begun falling in love with her. Convinced that Antonio's story is far-fetched and that he is simply manipulating Ania, Tomek takes drastic action.
Tomek and Piotr Głowacki (Marcel) track down a woman they believe to be Antonio's wife. They crash the second date between Ania and Antonio, with Tomek recording the entire scene on camera and loudly accusing Antonio of being a cheater. However, the plan backfires spectacularly when it is revealed that the woman is actually Antonio's sister. Devastated and disgusted by Tomek's behavior, Antonio leaves. Ania is furious; she scolds Tomek and declares that she never wants to see him again. Marcel, appalled by Tomek's lack of ethics, resigns from his position.
A few days later, Antonio visits Ania to tell her that they cannot continue dating. The chaos caused by Tomek made him realize that he is not yet emotionally ready for a serious relationship. The two part ways on amicable terms.
As the finale of Tomek's show approaches, the production team intends to air the recording of the disastrous date, much to Tomek's deep regret. In a final act of redemption, Tomek enlists the help of Marcel to hijack the broadcast. Instead of the scandalous footage, he airs a montage of "Hania's" past dates, revealing that those men actually found love because of their failed experiences with her. Tomek delivers a heartfelt speech praising "Hania," describing her as brave, honest, and confident—qualities he admits he lacks. He presents her as an everyday hero and warns the viewers not to end up alone as he has.
Moved by the speech, Ania's mother finally reconnects with her daughter. Shortly after, Ania notices that "Bitter-Sweet" is trying to contact her again. She agrees to a date and discovers that the mysterious user was actually Tomek all along. In a grand gesture, Tomek arrives at the date dressed in full knight armor, confessing his love for her, and the two share a kiss.
Parallel to this, a subplot involves Weronika Książkiewicz, who plays Ola, a hairdresser and friend of Ania. Ola is fired from her job because she ignores her clients' requests to follow her own "infallible" professional vision. Her boyfriend, Tomasz Karolak, who plays Bogdan (the director of Ania's school), is disappointed by her lack of discipline. Furthermore, Bogdan's daughter, Joanna Jarmołowicz, who plays Zośka, harbors a deep hatred for Ola, blaming her for the fact that her mother left the family.
When Ania reveals that Bogdan has a profile on "Planet Single", Ola suspects he is cheating. She creates a fake profile to trap him and begins chatting with "Bogdan." However, the profile is actually a fake created by Joanna Jarmołowicz (Zośka) to manipulate the couple into breaking up. Bogdan, seeing Ola's fake profile, believes she is the one cheating. This culminates in a loud, public argument where both believe the other is unfaithful, leading to their breakup. Zośka records the fight and posts it online.
Eventually, Bogdan is miserable, and Zośka begins to feel guilty for her deception. She visits Ola to apologize and explain the fake profiles, urging her to return to Bogdan. Ola initially refuses, realizing that the situation highlighted a lack of compatibility and that Zośka's behavior reflected a troubled family dynamic. However, after one of "Hania's" former dates finds love with one of Ola's previous clients, and Zośka accidentally calls Ola "mom", Bogdan reaches out once more. The three eventually reconcile and grow together as a family.
