David Heller and 'Laila' Steimle plan a grand wedding in his father Robert's castle hotel in Brandenburg. Their parents never met, and as expected, the very different families don't get along. David's mother, drama queen actress Margret, secretly ordered his ex Katrin Schnier as caterer, with whom he spent a,other night, which leads to canceling the wedding after she knocks him a bloody-nose. The party isn't duly canceling, so the parents enjoy it. Their own marriages being very shaky, each bonds, very drunk, with the other's spouse. The finale is utter truth time.