Crying children, changing diapers, baby food - everything around Jan seems to revolve around having children. Not only is his best friend Theo a new father, but his sister-in-law Marion's children also keep the successful engineer on his toes. So it's all the better that Jan's marriage to Hanna is a child-free zone. Until now - because Hanna's family plans are becoming more and more concrete... When she brings up her desire to have children one evening, a heated argument develops that ends in a compromise: To test whether the couple is even ready to take responsibility for a child, they first want to look after a dog for a few weeks. If that goes well, they can start thinking about having a baby. A short time later, bulldog Lucky moves in with them and causes a huge stir in the couple's lives...