The Substitute: Failure Is Not an Option

Karl Thomasson, an ex-Special Forces soldier and retired mercenary, is approached by his old army buddy Teague who gives him a mission: working undercover at a military school where Ted, Teague's nephew, is one of the cadets. Teague believes that the cadets and the student faculty are part of a white supremacist cult being run at the school. Karl accepts the mission and begins working as a history teacher at the school, seeking to expose and eradicate the cult.