The Topham family live a blissfully happy life together in the lovely market town of Dunmow in deepest Essex. Recently married Basil Topham (David Tomlinson) and his beautiful wife Julie (Petula Clark) are patiently waiting for their house to be built by local builders. Until then, they are forced to live with Basil s parents and eccentric grandfather (A.E Matthews). Basil and Julie have been entered into the Dunmow Flitch, a competition for the happiest married couple and all seems idyllic with our newly-weds. That is until a beautiful maid Marta (Sonja Zieman) arrives from Hungary to run the Topham family home and inadvertently throws everything into chaos!!