Marianne is unhappily married with the rich Arvid Croneman. Arvid has been ill for some time and Marianne has been looking forward to his passing away. However, Arvid recovers. Marianne has had an affair with Lennart Hägg, her husband's doctor. She steals poison from his office and makes sure that her husband gets a poisonous injection that swiftly kills him. After his burial, Arvid's relatives, who lives in the house, treats her with suspicion. Has she really gotten rid of all the evidence?
| Actor | Role |
|---|---|
 Harriet AnderssonMarianne Croneman | Marianne Croneman |
 Ulf PalmeArvid Croneman | Arvid Croneman |
 Erik StrandmarkThe doctor | The doctor |
 Sture StrömHans Lundin | Hans Lundin |
 Renée BjörlingArvids mother | Arvids mother |
 Georg FunkquistJörgen Bengtsson | Jörgen Bengtsson |
 Siv EricksArvids sister | Arvids sister |
 Curt MasreliezCurt | Curt |
 Mona MalmAnita | Anita |
 Tekla SjöblomMrs. Olsson | Mrs. Olsson |
 Wiktor AnderssonMr. Olsson | Mr. Olsson |
 Birgitta AnderssonAnna Högman | Anna Högman |
 Gösta CederlundTheater Agent | Theater Agent |
 Gunnar OlssonForensic Chemist | Forensic Chemist |
 Sven HolmbergPolice | Police |