Young entrepreneur Artem, using the capabilities of a popular classmates website, is trying to find his school friend Masha. Quite quickly he finds her contacts and contacts her. But in response, in addition to Masha’s letters, anonymous letters with threats begin to arrive. Artem learns that all his classmates registered on the site receive similar letters. Soon, the unknown maniac moves from threats to action, and one by one, former classmates begin to die. The police suspect Artyom, and Artyom has no choice but to start his own investigation. The first findings were shocking...