The fascinating story of Zdenka Wasserbauerová, who, at the age of 82, is intensely dedicated to expanding the bone marrow donor registry and, above all, giving patients a chance at recovery... A grandmother and a teenager full of energy rolled into one. That's how people around her describe Zdenka Wasserbauerová. Where does a woman who, at 82, could be enjoying a well-deserved rest, find the strength to spend whole days on the road, on her feet, and above all, never-ending recruitment of potential donors? To answer this question, we must go back to the time when her grandson and the film's director fell ill with leukemia as a child. Pavel recovered, but his friend Honzík was not so lucky. No suitable bone marrow donor could be found for him. Since then, "Grandma Chance" has been literally "going for the bone marrow" and, with never-ending enthusiasm, has been spreading awareness and working intensively to expand the bone marrow donor registry for more than 25 years.