Rebellious schoolgirl Dana grieves for her younger sister, a once-happy kid who suddenly stepped in front of a train. Desperate to learn what happened, she explores her sister's online history, discovering a sinister social-media game.

The director of the orphanage, Andrey Mast, is fighting the lawlessness reigning there and introducing strict rules. The new pupil Inna opposes these rules and will seek justice in her own way.