At the Jakarta Fair, there is a rumour that a major tycoon from Makassar will come looking for new machines and a business partner. There is a flurry of excitement as everyone tries to get the tycoon’s employees to drop by their stands. Mansur, one of business owners in the fair, asks his secretary, Sinta, to find Andi Rachmat Syah, the tycoon. Sinta then approaches Andi, a handsome man employed by the tycoon, to find out about his boss. The man promises to tell Sinta on one condition, that she has to take him around the fair. Samiaji, Mansur’s business competitor, who has a crush on Sinta, is jealous when he finds out about it. Till the end of the story, nobody knows that Andi takes Sinta home after nights of going around the Jakarta Fair.

Two businessmen, Burhan and Benny, are rivals and Burhan hires Joko, an ex-convict who is trying to reform. Joko is asked to investigate Benny, through Leila, a hostess that Benny usually goes to. But then Joko and Leila fall in love and things do not go as planned. A accident happens and Leila is shot by Joko. Burhan dies in a car accident while Benny runs away out of the country. The reason of enmity between Burhan and Benny is unclear, nor that of Leila’s role, who knows so much about Benny’s secrets.

The colonial court sentenced Tohir harshly on 22 September 1938. The sentence is made harsher because the prosecutor, Hasan, discriminates more on Tohir’s lineage than his crime. But in fact, Tohir commits his crime out of necessity as his wife is pregnant and about to give birth. He is sentenced to hard labor in exile so when he finds out that his wife and child are dead, Tohir escapes and kidnaps Hasan’s son, Husin. He raises the son in a life of crime, but lives like a respectable man. Husin also lives a double life. He is loved by an innocent girl in the village, but in other places, he plays around with women. In his old age, Tohir becomes a drunk and then he finds out that the government has awarded Hasan for his services. He uses Husin, nicknamed Boy, to avenge himself by sending him to rob Hasan’s house. Husin fails and is sent to trial. There, while drunk, Tohir reveals who Husin really is. Hasan and his wife then welcome Husin back.