Günther, Michael, Barny and Franz, real Munich boys, want to make their own music: Rock 'n' Roll Bavarian-style. Will they go under or make it to the top?

Hoteliers Otto and Ludwig König run a luxury hotel at Munich's Viktualienmarkt. They are surprised by a visit from their rich sister Nane, owner of the Hotel Sacher in Vienna: she wants to marry for the fifth time and this immediately causes alarm among the brothers. The future husband, Dr. Brösel, is put under the microscope.

A young woman wants to know who is responsible for the death of her parents. Ten years ago, little Sonja and her brother Niki Schmitt lost their parents in a car accident. Mayor Gassner provided accommodation for the two at that time. Sonja now returns to her hometown to solve the death of her parents. She blames Mayor Gassner until she learns the whole truth.