What is supposed to be an educational and collaborative weekend professional development session for the English Department of Prescott High School instead turns into a blood soaked nightmare when a masked killer targets them. What is supposed to be an educational and collaborative weekend professional development session for the English Department of Prescott High School instead turns into a blood soaked nightmare when a masked killer targets them. What is supposed to be an educational and collaborative weekend professional development session for the English Department of Prescott High School instead turns into a blood soaked nightmare when a masked killer targets them. What is supposed to be an educational and collaborative weekend professional development session for the English Department of Prescott High School instead turns into a blood soaked nightmare when a masked killer targets them.