Julien and Léonie Toudoux are expecting their first child. The trouble is that Baby will normally arrive one month in advance. That is why Madame Virtuel, the midwife, settles down in the Toudoux's house. Another problem is that Léonie is very agitated and keeps making a fuss about her condition. Poor Julien pampers her every minute of the day but to no avail. His role is not easy, all the less as his parents-in-law join forces with Madame Virtuel to conspire against him...