In a clash of distant centuries and cultures, two children from the 7th century awaken inside a mystical cave from a thousand-year slumber into the chaotic 21st century. Along with them, two ancient Slavic gods rise, incarnating themselves as the parents of Petr and Simona, siblings from the 21st century, leading to countless entertaining adventures in which the four children join forces and bridge the gap between old and new times, cultures, and customs to save the souls of their parents, who are currently unbearably divine.

The story begins at the moment when the parents of twelve-year-old Nikca and six-year-old Tomas leave for the weekend, and the children have their apartment to themselves for the very first time. And without supervision! Nikca decides to put her little brother away in his room and invite her friend Gabča over, planning to order pizza, watch a horror movie on video, and just have fun. But watching a forbidden scary film is not meant for them.