Krystallo and her uncle Artemis have an advertising agency and their business is not going well. The competitor, the Slogan advertising agency, owned by three young men, has crushed them in the market. Artemis's plan is for his niece Krystallo to get a job at Slogan, and from there steal the advertising messages and give them to him. But Krystallo, going to the company, falls in love with a partner, Nikos, and thus forgets her mission and her uncle. The accident but for her it is that Nikos' partner also falls in love with her and threatens to break up the company if he doesn't marry her. Faced with this impasse, he decides to hold a karate match and whoever defeats Krystallo will marry her. Uncle Artemis is appointed as the referee of the match....