Kelvin Harrison Jr. (center) plays a former child soldier who lives with his adoptive family in Virginia and winds up in conflict with his high school history teacher (Octavia Spencer, left) and adoptive mother (Naomi Watts).

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Kelvin Harrison Jr. (center) plays a former child soldier who lives with his adoptive family in Virginia and winds up in conflict with his high school history teacher (Octavia Spencer, left) and adoptive mother (Naomi Watts).