The Midnight Note (Seventeen: Jeonghan )

A girl returns home to find her family missing and a note instructing her to meet them at the park at midnight. Suspicious but curious, she goes to the park, only to realize her family is abroad and unreachable. Realizing the danger, she rushes to her aunt's house, who calls the police. The next day at school, she finds it strangely empty. Discovering that the city is on lockdown, she realizes she is alone. After escaping the school, she wanders through an unfamiliar, deserted city until she reaches a mansion where she encounters 13 vampire princes. The story leaves her fate uncertain-will they help her return to the real world or will she become their next meal?