The series takes place in the fictitious German city of Meppersfeld. It tells the story of a group of teenagers who decide to fight together against injustice and social problems. Lea, a high school student from a wealthy family, is bored and frustrated by her privileged life. She doubts her parents' way of life, who consider themselves to be cosmopolitan and environmentally aware. Lea feels that she wants to do more than them in order to create a better world. When Tristan, a new classmate, comes to Meppersfeld and quickly makes friends with the outsiders Zazie, Rahim and Hagen, Lea's interest is aroused. Tristan uses the personal circumstances of the very different teenagers in order to inspire them for a common fight against grievances and injustices. Rahim and his family, for example, are regularly attacked racially. In addition, his family is threatened with the loss of their apartment because an investor wants to renovate the building into expensive luxury apartments. Hagen's parents who are organic farmers lost their economic livelihood after waste sludge from a local paper mill contaminated their fields. Zazie is bullied by classmates and feels oppressed by sexist gender stereotypes she doesn't match. After a short hesitation, Lea also joins the group, which meets in the afternoon on an abandoned factory site to plan the next steps together. Driven by Tristan, the actions of the group, which is soon to be called "The Wave", are becoming increasingly radical and risky. What begins as an idealistic and playful revolt against the establishment, soon gets a threatening momentum. Central is the conflict between Lea, who believes in peaceful forms of protest and resistance, and Tristan, who considers Lea's optimism naive and is vehemently opposed to opening the group to other members. As the story progresses, it becomes clear that Tristan has personal motives for his radicalism and is planning a terrorist action against a major gun manufacturer. In the showdown, Lea can prevent Tristan's attack in the last moment. With a media-effective action, Lea manages to inflict great economic damage on the weapons manufacturer, who has violated numerous legal requirements.
Luise Befort as Lea Herst, a wealthy girl who is fed up of her life, member of The Wave and Tristan's love interest
Michelle Barthel as Zazie Elsner, a student who is constantly bullied, member of The Wave, Hagen's love interest, has a crush on Tristan and was once bullied by Lea
Daniel Friedl as Hagen Lemmart, an antisocial boy, member of the Wave and has a crush on Zazie
Mohamed Issa as Rahim Hadad, an Arab who is bullied because of his race; member of The Wave, and Paula's love interest
