In a gaudy fitness studio, where top athletes meet cappuccino-drinking mommies, where problem zone exercises, Zumba and wellness are at home: This is Aunt Gudi's studio and here is the pudgy Flo the new employee. She has to show that competence doesn't have to go with size. But Gudi wants to play Cupid and bring Flo back together with her ex Fabio, who now works at the studio and make sure that Flo finally loses weight and becomes healthier - well, prettier. Besides, she needs Flo for financial affairs. Flo is torn between Fabio and the married but incredibly sweet fitness trainer Sebastian.