Scratch.

Joanna and Jan's marriage seems happy. After the birthday party is over, Joanna unwraps the gifts she received. One of them is a videotape with a recording of a regional TV program, during which a historian named Marczak tells about Jan's cooperation with the political police, which began back in the 1950s, by reporting on Joanna's father. At first, Joanna believes in her husband's innocence, but soon becomes suspicious and begins a private investigation.