Anka (Adrianna Biedrynska) an attractive acting student lives together with her father, Michal (Janusz Gajos). Her mother has been death since she was born. They get on well together and have relation of more like friends than like father-to-daughter. Michal travels often on business trips abroad and Anka does not feel home alone without him.
One Easter Monday, after playing the traditional water tricks on each other, Anka drives Michal to one of his trips, earlier that day she had discovered an envelope with her father's handwriting "Open after my death." It is later revealed that she had known about the envelope for years but this was the first time that Michal had left it behind. 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 about opening this envelope.
One week later, Michal is back again from his trip and Anka is waiting for him at the airport. He runs happily to her, but she is not happy at all and starts immediately quoting her mother's letter, explaining that Michal is not her real father. Michal is not surprised about this, but also explains that he did not know about the content of the letter neither. He had meant to give her the letter earlier in life but felt that she was either too young or too old and finally decided to leave the letter for Anka to find in order to help the inevitable happening. Anka asks herself if her feelings to her father have been only as a friend and parent, or also to the man, since she somehow felt that she was being unfaithful when going out with other men. Her father admits feeling a man's and not only a father's jealousy against Anka's boyfriends.
Finally, Anka surprisingly reveals the truth. She has not opened the letter but wrote a new one instead, imitating her mother's handwriting after finding amongst her possessions from the hospital a similar envelope. The original envelope remained closed. After a long discussion they decide to burn the letter. However the paper is not burnt completely; they can read part of it which is very similar to the way Anka's fake letter began. The film ends with them trying to read the fragments of the partly burnt letter and completing the missing words: "My dearest daughter: I have something important to tell you: Michal is not... "
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