Trapped by the five commandants Kazami Shiro falls into an unbreakable cell. Tachibana Tobei, in a bid to rescue Shiro, poses as a scientist who has developed an antidote to the nerve gas, and is abducted. Meanwhile, Shiro turns the table on Ambassador Hell and takes him hostage in order to escape. But, he must infiltrate the outpost once more in to rescue Tachibana and Junko. Can V3 save Japan, as well as his friends, from certain death?