At 10:00 a.m., the principal of Opportunity High School finishes her speech welcoming students back from winter break.
At 10:02 a.m., students get up to leave the auditorium for class.
At 10:03 a.m., the auditorium doors won't open.
At 10:05 a.m., someone starts shooting.
This story is told from 4 different perspectives over the span of 54 terrifying minutes. Fear reigns as a former student's revenge turns into a game of survival.