A widow has married rich, but didnt tell her husband about her son. And hes coming for a surprise visit. To hide his identity he is introduced as the husbands new valet, but still the husband has some doubts about a few strange scenes. And during the night, when the son tries to visit his mother, the husband always starts interfering, but the new maid also behaves strangely, trying to sneak into the husbands room...