H.F.F.M. - "Hands off Mom" - is the name of an association founded by four siblings to keep their mother all to themselves. Now they don't want any more strangers in their private paradise. The small family lives in a cozy attic apartment in Copenhagen. The mother is a writer, and since she is divorced, she has to manage on her own.

The film is a sequel to Hold fingrene fra mor (Hands Off Mom). Berthe Quistgaard and Helge Kjærulff-Schmidt play the leading roles in this delightful romantic comedy. Lulu Vänner is about to get married for the fourth time. She is the mother of four children from three different men, but perhaps the fourth time will be the charm. Although the children like Lulu's fiancé, John Carstensen, they are not keen on the idea of marriage.