Ann-Kathrin Kramer plays tough magazine journalist Alexa, 29 years old, who writes her fingers to the bone for a Munich lifestyle glossy, churning out features about unfaithful men, relationship problems and unhappy couples. But all her wise words are to no avail when Cupid’s arrow suddenly strikes Alexa herself... and the man she falls for is none other the editor of the magazine, Philipp (Hajo von Stetten). Despite all the warnings she hears - for Philipp is well known as a ladies’ man - Alexa is convinced that he will be faithful to her.
And when it turns out that her husband-to-be has cheated on her already, she decides to teach him a sharp lesson on the subject of love and heartbreak, with the help of a new acquaintance, Nick (Jan Sosniok). Alexa sets Nick’s attractive ex-girlfriend Florentine (Regula Grauwiller) on Philipp. But in the end nothing works out quite in the way Alexa had intended with her “devilish” plan.