| Dekalog: Four | |
| Director: | Krzysztof Kieślowski |
| Producer: | Ryszard Chutkovski |
| Starring: | Adrianna Biedrzyńska Janusz Gajos Adam Hanuszkiewicz |
| Music: | Zbigniew Preisner |
| Cinematography: | Krzysztof Pakulski |
| Editing: | Ewa Smal |
| Distributor: | Polish Television |
| Runtime: | 56 minutes |
| Country: | Poland |
| Language: | Polish |
| Budget: | $10,000 |
Dekalog: Four (Polish: Dekalog, cztery) is the fourth part of Dekalog, the drama series of films directed by Polish director Krzysztof Kieślowski for television, possibly connected to the fourth imperative of the Ten Commandments, "Honor thy father and thy mother".
Anka (Adrianna Biedrzyńska), a drama student, lives with her father, Michal (Janusz Gajos). Her mother has been dead since Anka was born. They get on well together and their relations are more like those between two friends rather than a father-daughter relationship. Michal often travels abroad on business trips and Anka does not feel very happy at home without him.
One Easter Monday, after playing their traditional water tricks on each other, Anka drives Michal to the airport, as he's off on another trip. Earlier that day she had discovered an envelope in her father's handwriting reading "Open after my death." It is later revealed that Anka had known about the envelope for years, but this was the first time that Michal had left it behind while he was on one of his trips. After a couple of days, she finally opens it. Inside, there is another envelope, on which she can read a short message from her mother "To my daughter, Anka." Anka wonders whether to open this envelope.
One week later, Michal is back from his trip and Anka waits for him at the airport. She is sullen and starts immediately quoting her mother's letter, explaining that Michal is not her real father. He slaps her, then explains that, while he is not surprised, he did not know about the content of the letter either. He had meant to give it to her several times but always felt that she was either too young or too old, and finally decided to leave the letter for Anka to find, in order for the inevitable to happen. Anka wonders if her feelings towards Michal have been only as daughter to father, or also as woman to man, since she somehow always felt that she was being unfaithful when sleeping with other men. She subtly tries to seduce Michal, who admits to also having felt jealousy, rather than just parental protectiveness, against Anka's boyfriends.
Finally, Anka surprisingly reveals the truth. She did not open the letter but wrote a new one instead, imitating her mother's handwriting after finding a similar envelope amongst her possessions from the hospital. The original envelope remained closed. After a long discussion they decide to burn the letter. However, the paper doesn't burn completely, Anka and Michal can read part of it, and the words are very similar to the beginning of Anka's fake letter. The film ends with them trying to read the fragments of the partly burnt letter: "My dearest daughter, I have something important to tell you. Michal is not... "[1]