His work on the first season of "True Detective" bought him the clout to finally make this long-in-development story of Agu, a child soldier who is pressed into service by a charismatic Commandant played by Idris Elba. The work by young Abraham Attah as Agu is one of the two great child performances this year, and it's a harrowing, unflinching journey into darkness. The film clearly illustrates just how durable the spirit of a child can be, even when driven to do unthinkable things to survive, and while it is a film full of ugly things, it is thrilling to see just how great a storyteller Fukunaga has become.