Famous interior designer Sybille Gregory and her husband, investor Blake, are a happy couple who have lived together for many years. They have three children growing up, and the friendly family lacks only one thing - a big house. Therefore, an offer to buy a beautiful old mansion at a cheap price seems like a gift from fate. However, free cheese only comes in a mousetrap - and the Gregory couple will have to be convinced of the truth of this proverb. It soon becomes clear that their house keeps a secret. And this secret is such that the realization of a dream can turn out to be a waking nightmare...