1화: 혈통 전염병이 성인을 사망하게 하고, 아이들이 뱀파이어에게 취약해진 상태에서 위험한 탈출 시도가 진행된다.

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An epidemic of unknown origin strikes mankind, killing all adults and rendering the youngsters at the mercy of the vampire kind. Four years later, Yuuichirou Hyakuya and his friends make a daring attempt to escape from the vampires, unaware that a mortal trap awaits them. (Source: Wikipedia)