三年前，一場登山墜崖事件發生。登山俱樂部會員Mike(袁成傑)遇難，俱樂部女服務生因工作失誤受到譴責而自殺。 Mike女友半年後與人低調結婚。不久，年輕作家柳飛雲(蘇有朋)以此為藍本，創作一本懸疑小說，但出版後卻毫無聲息。

       三年後，創作受阻的柳飛雲，在經紀人李曉峰(胡明)的鼓動下，參加了一個短期豪華旅行團。柳飛雲、李曉峰、大書商卓然(杜俊澤)及妻子張惠(吳佩慈)、無業遊民白秀清(史光輝)、旅居國外的建築設計師段新宇(劉小溪)、畫家林泉(林龍麒)及妻子林梅(楊瀟)一起入住了山頂1號別墅。午夜時分，卓然卻無故人間蒸發。

       原來，一切與三年前的事故息息相關…。

       3 years ago, that is an incident which a people fallen from the mountain, and the waitress who in charge is suicide because of the condemnation. After 3 years, the writer Liu Fei Yun (Alec Su) who is famed for writing detective stories is accidentally involved in the mysterious case which series of murders happen in a mountain villa during his trip. Can Yun Fei’s detective skills help him discover the real murderer?