As humans turn into savage monsters and the world plunges into terror, a handful of survivors fight for their lives — and to hold on to their humanity.

Wi Seung Hyun joins the Korean national Police University to follow in his father's footsteps but runs into hurdles as he gets involved with a woman named Go Eun Gang.

Jeon Se-mi (Jang Shin-young) was once a pure and innocent girl. But that all changes when she is betrayed by her lover, loses her family, and raped. Her traumatic past pushes her on a path of vengeance against the people who wronged her and made her life into shambles.

Young Kim Chang-soo is placed behind bars, charged with murdering a Japanese person who took part in Empress Myeongseong's assassination. In prison, Kim Chang-soo sees how Koreans are persecuted and grows into a fighter for Korean independence.