The story takes place in a huge and gloomy manor. Mr. Bodi (Lee Ving) is the owner of the manor. He invites six guests to his manor. They are Professor Plumm (Christopher Lloyd Christopher Lloyd), Mr. Green (Michael McKeane Michael McKean), Mrs. Peacock (Irene Brennan Eileen Brennan), Mrs. White (Madeleine Kahn Madeline Kahn) and Colonel Mastad (Martin Moore Martin Mull). Just as the six men were gathering in the hall, the lights suddenly went out, and when the light came again, what appeared before them was the body of Mr. Boddy, the owner of the manor, which meant that in the manor, a cold and bloody killer was hidden. Six guests joined hands to try to find the killer, and in the process, people were killed again and again. Where on earth is the real killer hiding?