"Big Manni" tells of the rise and fall of the cheater Manfred Brenner and his company "FloxTex" in the 80s. Using a snowball system, he quickly creates a huge consortium of companies. Manni leads a life in the lap of luxury.
15 years ago, a man murdered the alleged rapist of his daughter. After his release, it turns out that he shot the wrong man. Against the resistance of his family, he sets out again on the hunt for the culprit.