It is set in a world where humanity is forced to live in cities surrounded by three enormous walls that protect them from demons and monsters that killed people referred to as Demonic; the story follows Lee Seokmin and friends, who vows to exterminate the Demonic after they bring about the destruction of his hometown and the death of their family. After 100 years of peace, humanity is suddenly reminded of the terror of being at the Demonic' mercy. Ships Kyeomshuhan Cheolchan Wonhui Soonhoon Gyuhao Verkwan