"Beasts of No Nation" is based on the highly acclaimed novel by Nigerian author Uzodinma Iweala, bringing to life the gripping tale of Agu, a child soldier torn from his family to fight in the civil war of an African country. Newcomer Abraham Attah gives a stunning portrayal of Agu, while Elba dominates the screen in the role of Commandant, a warlord who takes in Agu and instructs him in the ways of war.