At 10:00 a.m., the principal of the high school in Opportunity, Alabama, finishes her speech, welcoming the entire student body to a new semester and encouraging them to excel and achieve. At 10:02 the students get up to leave the auditorium for their next class. At 10:03 the auditorium doors won't open. Then, at 10:05, someone starts shooting. Over the next 49 minutes, the lives of everyone in the room will hang in the balance between life and death. Because everyone has a reason to fear the boy with the gun.