This is a by-the-numbers but fascinating portrait of a “closed city” (one of maybe 20 in the entire world) in which access is restricted, due to the presence of nuclear weapons manufacturing. (There is one such city in the US, Mercury, Nevada.)
The documentary is brief and pretty typical of documentaries of this type. But it is still worth it for seeing a part of the world which we’d never be able to see without the cameras smuggled in and the footage smuggled out. The city’s role in the USSR/Russia’s nuclear weapons history (and the poisoning of that spy) is also fascinating.