在这部三角墙山庄悬疑/犯罪片中,山庄近来发生了一件极其古怪的事情……
一日，一个神秘人物向屋主麦伯利太太声称：他看中了这所陈旧宅子，并开出一个令人惊讶的高昂价格，希望屋主能将宅子整个儿卖给他……“整个儿”的意思是“屋内包括家具、地毯、书籍等等在内的”一切“特品，而且即便是屋主的私人用品，未经检查，都不得带出屋外……
Sherlock Holmes'advice is sought by the elderly Mrs. Mary Maberley who has a particularly odd puzzle for him to solve. About one year ago she bought her current house, The Three Gables, and had lived there with her grandson until his recent death following complications from a ruptured spleen. She was shocked when approached by an estate agent who essentially offered her a blank cheque to buy The Three Gables from her in its entirety, including all of the contents. The old lady was keen to sell as, having lost her grandson, she now hoped to finance a 'round-the-world tour. The terms however included that she take nothing whatsoever from the house, not even the portrait of her grandson hanging on the wall. This she could not do and declined the offer to purchase. Did she make the right decision, she asks Holmes? It is evident that there is something in the house that someone is prepared to pay any price to get their hands on. Holmes soon finds that the connection has to be the grandson and a romance he recently had with a very attractive older woman.
