The Mráz family is preparing for holidays. Parents are traveling to the spa and little Petr is going to the country to his grandparents. In addition, to the chaotic preparations, mother's friend is bringing a dog Blek. She wants Petr to look after it. Grandfather welcomes Petr and the dog with pleasure because he needs the ally against strict grandmother. Grandfather is not very skillful and thus grandmother often experiences troubles with his ideas.
Tomáš Holý
as Petr Mráz
Bohumil Vávra
as Grandpa
Věra Tichánková
as Grandma
Jiří Hrzán
as Dad
Hana Maciuchová
as Mom
Oldřich Navrátil
as Plavec
Naďa Konvalinková
as Plavcová
Vladimír Kratina
as Drtikol
Pavel Stránský
as Jarda
Monika Kvasničková
as Milena
Roman Šmalcl
as Zdeněk
Jakub Heglas
as Jirka
