is able to gain control of his brother Mardjoeki's wealth and plantation, Soemberwaras. The latter disappears, leaving behind his adult son Mochtar (Mohamad Mochtar). At the plantation, the young man is treated as a servant and often beaten by Djoekri and his right-hand man, Hasan. Djoekri's son Joesoef (Mohamad Sani), however, leads a life of plenty.

Soon Djoekri's activities are targeted by a masked man known as the "Black Wolf" ("Srigala Item"), who also