As part of a rite of passage known as "merantau," young Yuda (Iko Uwais) leaves his tiny farming village for Jakarta. But he ends up saving orphan Astri (Sisca Jessica) from a human-trafficking ring ruled by the evil Ratger (Mads Koudal). With vengeful villains hot on their trail, Yuda must keep Astri and her little brother, Adit (Yusuf Aulia), safe in the pimp- and mob-ridden streets of the city in this fast-paced Indonesian thriller.