When Yulia's father starts having problems with his business, he moves the family from St. Petersburg to Vyborg. Yulia finds herself in a new school, but her classmates are hostile to her. She meets Tema and Fred, who turn out to be members of a strange online group. The group is led online by an unknown person, Gurd. They hold events designed to teach arrogant classmates a lesson. But the pranks of new friends soon cease to be innocent. Julia decides to leave the group, but it turns out that it is too late. It is no longer teenage schoolchildren who are being targeted, but their parents...