美國聯邦密探Mulder及Scully奉命調查一連串懸疑兇殺案。受害者的肝臟被離奇移走，但屍體上並無開刀所做成的傷口位。他們更發現同類型的兇殺案由1903年起每隔30年就會重演一次。Mulder與Scully現在要與時間競賽，趕在兇手落手前將他繩之以法。

　　FBI agents Mulder and Scully are investigating a series of very unusual murders: all the victims' livers have been removed without the help of tools and there is no apparent point of entry. Scully and Mulder begin to get nearer the truth when they discover that these murders have been recurring every 30 years since 1903. However, they don't know that the killer has already found its next victim…