The story of man who kills his friends during night party by toxin gas. He films the moment that the guests are breathing gas until they die. He attempts to kill other guests who didn't come to the party in several ways.
| Actor | Role |
|---|---|
 Michel DuchaussoyLe commissaire Gaborit | Le commissaire Gaborit |
 Roger DumasIndra | Indra |
 Fiona GélinLucienne | Lucienne |
 Tanya LopertRita Kikerman | Rita Kikerman |