Kateryna Anatoliyivna (Katya) teaches her first class at the school: she wants the children to understand why the economy should be known. Alex also comes to his first class, but right away he does not find an understanding with the students. Pasha's younger brother founds a grenade in a sandbox, and Lola wants to film it for her video. Khrystyna is trying to inform teachers of the danger, but instead, the girl gets beaten up.