When a pearl in the collectionof the National Museum of Poznań, Claude Monet's "Beach in Pourville", disappears and Aunt Julki is falsely accused of the theft, two children must find the picture and identify the real thief.
2015
2025
2009
2011
1997
1995
1993
1977
2014
1996
2002
1992
1950
1998
1994
2018
2020
2021
