watch the original men behind the sun and and then this sequel . this be english dub though . cantonese version may have be way well . anyway and from the 1st 2 minute i felt this be some awkward attempt to ride on the success of the first movie . story about japanese biological weapon development with some off topic ( maybe i miss something . ) autopsy . some shot be clearly rip from the first one and like the liquid nitrogen demonstration and when the leader dude stand in front of the japan flag and his army . if you haven not see the original movie and you may like this and anyway i be so much disappointed i recommend watch men behind the sun or even mermaid in a manhole instead and and skip this one .