Inspired by the discovery of a trilobite fossil, as well as little Jirka’s longing to see his favourite museum exhibits in the flesh, four boys set off on an adventure. Petr the narrator, Jenda the expedition leader, Toník the photographer and Jirka, the youngest, hop in a boat and navigate the cave near where Jirka found the prehistoric fossil. Thus begins a journey into prehistory, where mammoths and more await. As they travel backwards through time, the landscape around them changes. In their diaries, they carefully record their thrilling encounters with prehistoric flora and fauna. The boys find themselves in various periods and environments, including the Late Quaternary, the Ice Age, the Tertiary, the Mesozoic and the Palaeozoic, all the way to a Silurian sea, where they finally meet a real, live trilobite. One of the finest children’s adventure films and a trailblazing piece of world cinema to boot, the film is being screened in its digitally restored edition for the first time in Slovakia.