In this film, the 85-year history of the Azot enterprise (Berezniki, Perm Territory), one of the largest enterprises among domestic producers of ammonia and nitrogen fertilizers based on it, is presented. The film uses unique archival documents and letters, newsreel, which almost no one has seen before. As well as interviews with witnesses of the most significant events in the life of Azot, which took place more than half a century ago.