The crazy and humour-packed adventures of Halszka and Florek, who go to see a museum and find themselves travelling – quite literally! – in time. The places they visit include Grunwald, medieval Kraków, and Gdańsk on the threshold of a new era, where they learn about historical figures and events. The heroes, although they are siblings, mainly disagree on everything. However, in moments of danger, they come to each other’s defence.
The whole story is made even more attractive thanks to some wicked illustrations by renowned illustrator Ignacy Czwartos.