The troubles of a young married couple with an overprotective mother and mother-in-law. Usually it ends with a wedding, but this time it begins. Young doctor Petr Dvořák marries the charming Marta Hábová. However, their honeymoon to Venice is unexpectedly complicated by Martina's widowed mother, a rich, kind, but very absent-minded lady. First, they are not allowed to cross the border because they did not declare the things she secretly packed for them for the trip, and then they spend the night behind bars because the mother-in-law, in her absent-mindedness, reports the secretly packed things as stolen after she catches a pair of robbers in her house. It is no wonder that the young marriage is soon shaken to its foundations...