“Black Panther” follows T’Challa who, after the events of “Captain America: Civil War,” returns home to the isolated, technologically advanced African nation of Wakanda to take his place as King. However, when an old enemy reappears on the radar, T’Challa’s mettle as King and Black Panther is tested when he is drawn into a conflict that puts the entire fate of Wakanda and the world at risk.