It is the dawn of the 1960s. In order to investigate the gruesome death of a brilliant young physicist, KGB officer Major Alexander Vasin must leave Moscow for Arzamas-16, a top-secret research city that does not appear on any mappages There he comes up against the brightest, most cutthroat brain trust in Russia who, on the orders of Nikita Khrushchev himself, are building a nuclear weapon with 3,800 times the destructive potential of the Hiroshima...