"The topics of this film are the emergence of fires and firefighting. For a fire to occur, three conditions must be met: there must be combustible material, there must be enough oxygen, and there must be a sufficiently high initial temperature to provide the necessary activation energy of oxidation. Firefighters call these three conditions, the ""burning triangle"". The film shows, among other things, how these conditions can be fought during firefighting. The best extinguishing methods for different combustible materials are explained, too."