AllMovie

When millionaire Wilson MacLeish, an extremely unpopular man who was notorious for his cruel practical jokes, is reported killed in a plane explosion, a surprised Magnum (Tom Selleck) learns that he has inherited MacLeish's estate--as well as an extra $50 million. Unfortunately, Magnum has also inherited a would-be murderer; MacLeish has left behind a tape recording, accusing one of his heirs (though not by name) of planning his death, and warning Magnum that he's next on the list. As the story progresses, Magnum begins to wonder if MacLeish was telling the truth, or if he is being set up for the practical joke to end all practical jokes!