In 1908 the Tunguska impact had more effect than believed until now.
After research by the Cheka in 1921, a body was discovered near the impact zone. The completely charred body was discovered to be Alejander Feidakin a Russian farmer that went missing a couple of months before the event, the scientist studying the body were baffled by the sheer fact that it had not been pulverized. The Moscow Cheka requested that the body be transferred to the central office.
After a broader analysis and many more tests, the body was found to completely resist decay, be it from abiotic or biotic decomposition. Further testing, using radiography equipment, showed that the body seemed to reconstructing itself in a completely autonomous way, Scientists and medical staff were baffled as to what process could be reverting the normal decomposition process, while keeping life-signs completely silent.
The Man from Tunguska was born. When the Cheka command was made aware of the results, it went in complete political crisis mode.
Internally, the command staff was divided, most high ranking officers, fearing possible contamination, advised caution and requested the body be destroyed immediately. Younger, brasher officers saw this as an opportunity for the advancement of their careers, by harvesting this regeneration process to help create better soldiers or even self-repairing armor. The crisis was so deep that it threatened to break the Cheka apart, to the pleasure of the other secret service branches. An agreement was finally reached, it insured that both camps would be able to save face. Without destroying the body, it was placed in quarantine and tissue samples were extracted to continue the research. The body itself was placed in a lead coffin, and sunk in the Sevastopol bay. The date was October 3rd 1925.
20 years later, following the staggering losses from WW2, the KGB and Polit bureau re-activated multiple research programs to help the soviet better face their enemies, they had to win the science race against their former ally, the United-States of America. One of these was Project S100A4 MR4, lead by Kapitan Nikodim Stepanovitch.