The first historical film of a radiation disaster in Hong Kong! After a fire accident that caused a radiation leak, the entire city suddenly found its survival hanging by a thread. In order to address the impending disaster, expert Simon Van (played by Andy Lau) joins the Emergency Crisis Response Team led by Acting Chief Executive Officer Cecilia (played by Karen Mok) to address this catastrophe. With 7 million people at stake, the fire brigade was mandated to stop the spread at all costs by entering the radiation zone. In the face of this unprecedented disaster, will Hong Kong wake up to an overnight annihilation?