Erik Lund is a child psychologist and defend a doctoral thesis on the subject. His knowledge is at the very theoretical level, and he will be seriously trouble when he for a time has to babysit his sister's six children ranging in age from baby to teenager. Fortunately, the neighbor cute daughter, Lisbeth has a more practical take on things.
A young man, who has vowed never to marry and doesn't particularly like children, is left in charge of his two very young nieces. At first they drive him to distraction, but then he begins to warm to them, and also to a beautiful young local girl.
