Park Alien (Night Ninja) was South Korea's biggest criminal. Jeon Jungkook was the heir of the biggest inteprise, Jeon Interprise. After Alien had got a higher rank at  work, her first mission was to kidnap Jungkook. At first they hated each other, but the more they spent time together the more they fell for each other. If he stays he would be killed .But if she lets him go she would be killed. What will they decide to do?