After bringing down a notable Jakarta slum lord, rookie cop Rama (Iko Uwais) learns from anti-corruption task force leader Bunawar (Cok Simbara) that his only chance of protecting his family and evading more prominent members of Indonesian organized crime is to erase himself from the files and go undercover. Assuming a new identity as "Yuda," Rama inserts himself in prison where he befriends Uco (Arifin Putra), the only son of influential mob boss Bangun (Tio Pakusadewo). Once released, Yuda begins work for the family doing menial strong-arm and collection tasks alongside Uco. But when the brash, impatient heir to the empire decides to wait no longer, he sets in motion a catastrophic chain of events that will pit Yuda against the most powerful rulers of Indonesia's criminal underworld – and the most dangerous assassins in their employ.