Ausgerechnet am Tag ihrer Hochzeit fand Franziska raus, dass ihr Verlobter ein Verhältnis hatte. Seither weiß sie, dass alle Männer Schweine sind, und sie beweist es immer wieder aufs Neue: Im Auftrag von Kundinnen, die die Treue ihrer Partner testen wollen, verführt sie die Typen reihenweise. An Markus aber beißt sie sich die Zähne aus - und verliebt sich prompt in ihn, nicht ahnend, dass sie bloß eine Figur in einem perfiden Spiel seiner Frau ist.

Alexander Keller is dead in the kitchen. Next to him is his wife Leonie, who called the police and confessed to the crime. Did she kill in cold blood, was it manslaughter or self-defense? Public defender Gottwald gets to the bottom of her client's story.

A French teacher makes a startling discovery while on a trip to Buchenwald.

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?