The money is earmarked for the construction of a second shelter, which is to seal up the sarcophagus surrounding the accident reactor at Chernobyl in order to prevent possible radioactive leakage. But a nuclear physicist, Konstantin Tjetjerov, from the Kurchatov Institute in Moscow - who has personally examined the ruined reactor - claims that very little radioactive material remains inside. In spite of the obvious conflict with the official explanations, he holds firmly to his original thesis: that around 95% of the nuclear fuel was expelled during the disaster in 1986. A German physicist Dr. Sebastian Plugbeil - who has completed 15 years of research on the medical and environmental effects of the accident - believes that Tjetjerov could be right and decides to make a daring expedition into the heart of the accident reactor!