The film revolves around a Japanese invention that finally brings Tesla's dream of wireless energy to fruition. Unfortunately it can also be used as an extremely powerful weapon.

K-20 inhabits a world that's very familiar to comic book readers, alternate history what-if. Here the Japanese have avoided WW2 and have evolved into a strange combination of the Taisho era with the totalitarian leanings of the Showa with technology seemingly mired in the 1920's even though the film is set in the late 1940's.The dark Knight must kick ass and save the world all with excellent cgi and a great story..