Homolka and Pocketbook(1972)

The husband and wife Ludva and Hedus Homolkas with their twins Péta and Máta and Ludva's parents - the granny and grandpa - arrive in the snowy Spindleruv Mlýn for a holiday. They promise to each other that they will not spoil the quite expensive holiday by quarrels. If somebody hurts the other one he/she will kneel as a punishment.