Save The Green Planet 2004

Lee Byeong-Gu is a sensitive, blue-collar sad sack, hopped up on conspiracy theories and sci-fi films, whose life has been derailed by one bad break after another. Yet he knows there's no such thing as bad luck. Only one thing could have made such a mess of his life: aliens. Nasty, disgusting aliens who have infiltrated human society. Sly aliens who are planning to destroy our planet at the next lunar eclipse. The one alien possessing the Royal Genetic Code needed to contact the Crown Prince and stop the destruction just happens to be his old boss, CEO Kang Man-Shik of Yuje Chemicals. So with the help of his circus-performer girlfriend, he sets out to kidnap Kang and torture him until he confesses to his alien identity and stops the invasion. Of course, it's hard to confess to something that's just a delusion in a sick man's mind.