Ariane Ostler (Michaela May) is a chaotic but down-to-earth dairymaid, who lives reclusively high up on her Upper Bavarian alpine pasture. Ariane is not interested in formal, bureaucratic matters, and has never submitted a proper tax return in her life. This comes back to haunt her as the very particular financial officer Bernhard Maiwald (Günther Maria Halmer) moves into the area and targets Ariane. So begins a humorous cat-and-mouse game between the two, in which Bernhard falls in love with the unconventional taxpayer. His feelings make his investigation no easier, and when they suddenly endanger Ariane's Inn and thus their existence, Bernhard must decide: does he still want to live according to his strict rules and regulations, or should he listen to his heart for the first time in his life?