Rumors have been circulating online for weeks about a strange sickness spreading in nearby towns. Students joked about it being "the zombie virus." No one believed it—until today.

That morning, a student fainted in 2nd period and violently attacked a teacher. Then another. By 4th period, the school is on lockdown. But it’s too late.

No one’s answering 911.

The doors won't open.

The infected are inside.