Mann, oh Mann, oh Mann!

Married vet Josef not only has a passion for dolphins, but also for other women. When his wife Barbara divorces him, Josef plunges into a life crisis and moves in with his lawyer friend Roman, whose household he thoroughly overhauls with feng shui and esotericism. In the meantime, Andreas, the third member of the family, has a child with Josef's ex-wife Barbara - but is overwhelmed as a father. Josef and Andreas join forces to form a fatherhood community. The owner of the apartment, Roman, is a nuisance and flees to Barbara.