May 2018, a virus spreads in Korea and then worldwide, half of the world's population is decimated and turned into human brain eaters. The Korean government tries to maintain the balance in its country. It is announced that a vaccine might be possible. Only a few lives that will have to be sacrificed to have it. A manhunt is ordered by the government, which wants these people to be arrested. Problems begin for Seventeen who was preparing for its debut in Japan. What if one or more members possessed the immunity sought for the vaccine. Escape or sacrifice? Is it really possible to save what little humanity is left in this world?