While Berlin-based businessman Paul Graf is in Shanghai, his nosy busybody mother Maria, who was only to mind his apartment, opens his mail, finds a letter notifying he's to become father and without consulting him travels to see the expectant mother, Nina, at her home, uncle Harald Brandl's farm and stork home. Maria falls in love with Harald but also finds the key to the Graf family's past, fled from Hungary during the Soviet-crushed rebellion. Paul arrives and finds Nina impossible to deal with, yet wants a bond with his unborn son.
