At the age of eleven, Ela can solve equations with three unknowns and calculate the mass of a black hole. But now she needs to calculate something more difficult: how to get along with her classmates, teachers, parents, and other people. Friendship, love, and functioning in a group are not easy subjects to test. A series for older children on the topics of communication, relationships, and mental balance. The educational aspect works on the specific principle of repeating a situation several times in different variations. Each episode begins with a collision, and Ela then reflects in her diary on how she could have handled the situation differently and better. (Česká televize)