Nothing seems to disturb Uncle Egon's peace, who lives in his castle under the watchful eye of the strict but fair housekeeper Mrs. Bischlock. The idyll is destroyed by the housekeeper herself, who abruptly resigns because she refuses to live under the same roof as a ghost. And poor Mrs. Bischlock has no idea that the ghost Vasil, who suddenly jumped out of an old Russian domino, now owns almost the entire castle, having won it from Uncle Egon. The already tense situation is exacerbated by the unexpected arrival of Egon's sister Stela with her two daughters – the beautiful Valeria, who is of marriageable age, and the little detective in skirts, Sisinka.