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.
as Julka Strzałkowska
as Olek
as Felka
as Julka's Aunt
as Kaja
as Karol
as Rafalski
as 'Dwukolorowa'
