Cesium-137 is one of the radioactive substances emitted into the environment during the Chernobyl nuclear disaster. In Latin, Cesium means "sky-blue", or "Azure". This is the story of those who were exposed to the "Azure Dust".

The story about Chornobyl area, all around the world we know of the disaster in 1986. The film may be called a guide to the Exclusion Zone. Thanks to the unique footage from the place of the tragedy, that the crew succeeded to capture, the viewers will have a chance for a full immersion into the atmosphere of the events and, along with the heroes of the film, feel the dreadful and amazing air that reigns where one of the major anthropogenic disasters took place.